Someone tell the old guy that is not acceptable

You go to a fancy restaurant bringing in a brief case filled with a mixture of
lettuce, ground beef, jello.

You go to the bathroom and
wait til an old guy has to use the stall.

As he goes in -
stand up in the stall next to him
and dump your brief case over his head.

Walk out holding your nose,
turn to a waitress and say
"Jesus lady someone did something nasty in there..i think the old guy has diarrhea"

Wait til he gets out- for everyones reaction- including his