If you're an improviser, you know how important it is to maintain some sort of reality when you're on stage. Whether that's holding a gun properly (no pointing fingers!) to putting on clothes to answering a phone, the way you do these everyday actions go a long way in helping propel scenes forward in a truthful manner. The following video, "How to Spot an Improviser," from CBesRun makes fun of space work. I thought you'd enjoy it.
The guy doing the phone bit is totally doing the space work weird. You only answer the phone with devil horns if hell is calling.