I've mentioned Dr. Demento before. I used to listen to his radio show on Sunday nights, and one of my favourite bits was "Who's On First?" from Abbott and Costello.
The entire skit is now on YouTube. It's as good as ever. Here's the transcript if you'd rather read than watch. If you want a fresh spin, check out the version I showed my son. They call it, "Who's On Force?".
In a piece of useless information that fascinates me for some reason, Canada's first ever all comedy radio channel CFHA in Saint John, New Brunswick chose this routine as the first sketch aired on their station. Now ya know.
