Disa-perry-ing

When one disappears for a long period of time and goes unnoticed by the people they are with, and then spontaneously appears at a later time.

John: Hey guys, lets go to the movies

Bill: Alright, Cool

John: Where's Sam?

Bill: Come on we're going to be late

....after the movie

Bill: Oh man that movie was so funny

John: Yeah that was the best thing I've seen in a while

Sam: Oh man guys that was so cool.

Bill and John: Oh there you are Sam! You must have been Disa-perry-ing on us again.