Shake it Like a Polaroid Picture™

Ever since the song “Hey Ya” by Andre 3000 of Outkast came out, everyone is shaking their Polaroid pictures. I have always been told that you should not shake a Polaroid picture, but I’m having a hard time convincing those around me that this is true. What is the answer?

Polaroid say “NO, just lay it down flat OK!”

OK then… But “lay it on a flat surface like a Polaroid picture” doesn’t sound nearly as cool does it?