I "ascertained" that I can easily annoy my wife after watching Kids In The Hall.

My wife and I have a favorite from the Stella sketch “Pizza” as well, and sadly it is used too often.

I don't think Reno 911 has been mentioned yet. The improv structure yielded multiple interlopers throughout the years, but I immediately thought of the children's television host in "SARS Outbreak" from Season 3.