diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2e2af43b..bfd8db3c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -5,7 +5,7 @@
     hooks:
         -
             id: pyflakes
-            files: '*.py'
+            files: '\.py$'
 
 -
     repo: git@github.com:pre-commit/jshint
@@ -13,7 +13,7 @@
     hooks:
         -
             id: jshint
-            files: '*.js'
+            files: '\.js$'
 
 -
     repo: git@github.com:pre-commit/scss-lint
@@ -21,4 +21,4 @@
     hooks:
         -
             id: scss-lint
-            files: '*.scss'
+            files: '\.scss$'
diff --git a/pre_commit/git.py b/pre_commit/git.py
index 3475f566..92efe4a4 100644
--- a/pre_commit/git.py
+++ b/pre_commit/git.py
@@ -1,4 +1,5 @@
 import os
+import re
 import pkg_resources
 from plumbum import local
 
@@ -27,4 +28,31 @@ def remove_pre_commit():
 
 def get_head_sha(git_repo_path):
     with local.cwd(git_repo_path):
-        return (local['git']['rev-parse', 'HEAD'])().strip()
+        return local['git']['rev-parse', 'HEAD']().strip()
+
+
+@memoize_by_cwd
+def get_staged_files():
+    return local['git']['diff', '--staged', '--name-only']().splitlines()
+
+
+@memoize_by_cwd
+def get_staged_files_matching(expr):
+    regex = re.compile(expr)
+    return set(
+        filename for filename in get_staged_files() if regex.search(filename)
+    )
+
+
+@memoize_by_cwd
+def get_all_files():
+    return local['git']['ls-files']().splitlines()
+
+
+# Smell: this is duplicated above
+@memoize_by_cwd
+def get_all_files_matching(expr):
+    regex = re.compile(expr)
+    return set(
+        filename for filename in get_all_files() if regex.search(filename)
+    )
\ No newline at end of file
diff --git a/pre_commit/run.py b/pre_commit/run.py
index 63ba44cc..464923b3 100644
--- a/pre_commit/run.py
+++ b/pre_commit/run.py
@@ -1,10 +1,19 @@
 
 import argparse
 import os.path
+import subprocess
+
 from pre_commit import git
 from pre_commit.clientlib.validate_config import validate_config
 from pre_commit.repository import Repository
 
+
+RED = '\033[41m'
+GREEN = '\033[42m'
+NORMAL = '\033[0m'
+COLS = int(subprocess.Popen(['tput', 'cols'], stdout=subprocess.PIPE).communicate()[0])
+
+
 def install():
     """Install the pre-commit hook."""
     git.create_pre_commit()
@@ -15,27 +24,76 @@ def uninstall():
     git.remove_pre_commit()
 
 
-def run_hooks(arguments):
-    """Actually run the hooks."""
-    raise NotImplementedError
+def _run_single_hook(repository, hook_id, run_all_the_things=False):
+    repository.install()
+
+    if run_all_the_things:
+        get_filenames = git.get_all_files_matching
+    else:
+        get_filenames = git.get_staged_files_matching
+
+    hook = repository.hooks[hook_id]
+
+    retcode, stdout, stderr = repository.run_hook(
+        hook_id,
+        map(os.path.abspath, get_filenames(hook['files'])),
+    )
+
+    if retcode != repository.hooks[hook_id].get('expected_return_value', 0):
+        output = '\n'.join([stdout, stderr]).strip()
+        retcode = 1
+        color = RED
+        pass_fail = 'Failed'
+    else:
+        output = ''
+        retcode = 0
+        color = GREEN
+        pass_fail = 'Passed'
+
+
+    print '{0}{1}{2}{3}{4}'.format(
+        hook['name'],
+        '.' * (COLS - len(hook['name']) - len(pass_fail) - 6),
+        color,
+        pass_fail,
+        NORMAL,
+    )
+
+    if output:
+        print
+        print output
+        print
+
+    return retcode
+
+
+def run_hooks(run_all_the_things=False):
+    """Actually run the hooks."""
+    retval = 0
 
-def run_single_hook(hook_id):
     configs = validate_config([])
+    for config in configs:
+        repo = Repository(config)
+        for hook_id in repo.hooks:
+            retval |= _run_single_hook(
+                repo,
+                hook_id,
+                run_all_the_things=run_all_the_things,
+            )
+
+    return retval
+
+
+def run_single_hook(hook_id, configs=None, run_all_the_things=False):
+    configs = configs or validate_config([])
     for config in configs:
         repo = Repository(config)
         if hook_id in repo.hooks:
-            repo.install()
-
-            retcode, stdout, stderr = repo.run_hook(hook_id, map(os.path.abspath, ['pre_commit/constants.py']))
-
-            if retcode != repo.hooks[hook_id].get('expected_return_value', 0):
-                for out in (stdout, stderr):
-                    out = out.rstrip()
-                    if len(out) > 0:
-                        print out
-                return 1
-            else:
-                return 0
+            return _run_single_hook(
+                repo,
+                hook_id,
+                run_all_the_things=run_all_the_things,
+            )
     else:
         print "No hook with id {0}".format(hook_id)
         return 1
@@ -60,6 +118,11 @@ def run(argv):
         help='Run a hook'
     )
 
+    parser.add_argument(
+        '--run-fucking-everything', action='store_true', default=False,
+        help='Run on all the files in the repo',
+    )
+
     args = parser.parse_args(argv)
 
     if args.install:
@@ -67,6 +130,6 @@ def run(argv):
     elif args.uninstall:
         return uninstall()
     elif args.run:
-        return run_single_hook(args.run)
+        return run_single_hook(args.run, run_all_the_things=args.run_fucking_everything)
     else:
-        return run_hooks(args)
+        return run_hooks(run_all_the_things=args.run_fucking_everything)