As I am not a big fan of these types of "jokes" (people can and do get hurt during these kind of stunts - been there, done that, so maybe that's why I dislike them so) I would have thought it funnier if the wife had dropped his gun on the cement and seriously marred the finish or broke something on it.
Any kind of horse play with firearms is never a good idea and it sends the wrong message to novices.
Okay, I'll lighten up now.