diff --git a/identifier.py b/identifier.py
index cd55087..92bbe82 100644
--- a/identifier.py
+++ b/identifier.py
@@ -119,7 +119,7 @@ def lookup_slackid_brother(slack_id: str) -> Optional[scroll_util.Brother]:
             return None
 
 
-async def lookup_brother_userids(brother: scroll_util.Brother) -> List[str]:
+def lookup_brother_userids(brother: scroll_util.Brother) -> List[str]:
     """
     Returns a list of all userids associated with the given brother.
 
diff --git a/main.py b/main.py
index 9fc0e55..53785a2 100644
--- a/main.py
+++ b/main.py
@@ -57,6 +57,14 @@ def main() -> None:
     help_callback = management_commands.list_hooks_callback_gen(wrap.hooks)
     wrap.add_hook(slack_util.Hook(help_callback, pattern=management_commands.bot_help_pattern))
 
+    # Schedule?
+    async def do_later(slk: SlackClient, msg: dict, match: typing.Match):
+        time = int(match.group(1))
+        await asyncio.sleep(time)
+        slack_util.reply(slk, msg, "hello!")
+
+    wrap.add_hook(slack_util.Hook(do_later, "pingme\s+(\d+)"))
+
     event_loop = asyncio.get_event_loop()
     event_loop.run_until_complete(wrap.listen())
 
diff --git a/management_commands.py b/management_commands.py
index 4da9866..a801f46 100644
--- a/management_commands.py
+++ b/management_commands.py
@@ -6,7 +6,7 @@ import channel_util
 import slack_util
 
 
-async def list_hooks_callback_gen(hooks: List[slack_util.Hook]):
+def list_hooks_callback_gen(hooks: List[slack_util.Hook]) -> slack_util.Callback:
     # noinspection PyUnusedLocal
     async def callback(slack, msg, match):
         slack_util.reply(slack, msg, "\n".join(hook.pattern for hook in hooks))
diff --git a/slack_util.py b/slack_util.py
index 365b1c9..db7cc2f 100644
--- a/slack_util.py
+++ b/slack_util.py
@@ -1,10 +1,10 @@
-from time import sleep
 import re
+from time import sleep
+from typing import Any, Optional, Generator, Match, Callable, List, Coroutine
 
 from slackclient import SlackClient
 
 import channel_util
-from typing import Any, Optional, Generator, Match, Callable, List, Awaitable, Coroutine
 
 """
 Slack helpers. Separated for compartmentalization
@@ -82,9 +82,13 @@ def message_stream(slack: SlackClient) -> Generator[dict, None, None]:
         print("Connection failed - retrying")
 
 
+MsgAction = Coroutine[Any, Any, None]
+Callback = Callable[[SlackClient, dict, Match], MsgAction]
+
+
 class Hook(object):
     def __init__(self,
-                 callback: Coroutine[[SlackClient, dict, Match]],
+                 callback: Callback,
                  pattern: str = None,
                  channel_whitelist: Optional[List[str]] = None,
                  channel_blacklist: Optional[List[str]] = None):