A Savin copier stands up to the standard butt pretty good. The secret is to get in a chair and *lightly* plant your tush on the glass, not jump up and hoist yourself up on it.
I had a co-worker who was fired and he made pictures of his bottom, and got an accidental shot of the bits and pieces as a bonus too, and later taped the copies to the boss' door.
I pressed the button.
A couple of years later I had enough of helping the rest of the department carry the manager and having him yell at me like a dog to boot, so I quit, (not fired) but I completely prepared for it. I bought Rosetta Stone's Russian program and learned to speak it fluently so I could tell him what I thought of him in his native language.
The look on his filthy, judgmental, domineering, nasty little sewer rat face was worth the months of learning an alphabet that looks like all the keys you never want to push on a calculator.