I remember a movie awhile ago. I think it was an HBO movie from the 90’s. The only thing I remember is a guy shrinks and is sitting in a pair of shorts using it like a tent and reading. Then another guy comes into the room and puts on the shorts the tiny person is in.
Attack of the 50 Ft. Woman (1993)? it was an HBO Original, and it employed a lot of sight gags like the one you describe. maybe you remember the normal-sized guy using his giant wife’s over-sized pants.
http://www.imdb.com/title/tt0106317/?ref_=fn_al_tt_5
Possibly I will check it out. thanks!
Please come back and confirm if this is the right movie.