I went over to a friend's house one morning & waited by the door for them but behind a columnar buckthorn. When she came out I used it. Scared her so badly she screamed & peed a little & had to go shower & change before we could go out to breakfast. To her credit, I'm amazed she even spoke to me after, much less still wanted to go that morning.
Supposed I picked a good one with an actual sense of humor. : )