Office pranks?

One of our security advisors is having his 50th birthday this friday and I've been given the assignment by my Director to find some pranks to pull on him and his office.

Any suggestions?

I work for the Department of Justice, so I can't really do outgoing stuff. As long as it's internal, I guess it's ok.
I was thinking of filling his office with balloons. Bad idea, good idea?

Jam it back in, in the dark.

I can't access his computer. But that's a nice one ^^

There's nowhere I can't reach.

Haha! The aluminum foil looks crazy fun! I might do parts of his office! But it's going to cost some money...

This thing is sticky, and I don't like it. I don't appreciate it.

I used the aluminum foil one and here's the result:








I did 'decorated' his room with some of my colleagues this afternoon.
Total amount of aluminium foils used:
90 meters = 295.27 feet (not sure what americans use...)


It's not as good as the example, but he get the point

How ya doing, buddy?