The trick is pretty funny. You can practice it either on your friends, or colleagues, or even boss.

What you need:
1 cardboard box,
a lot of confetti, foil particles, or other small pieces of paper
a cupboard in the room

What to do:
You should take a sheet of paper and paint or prink a remarkable inscription such as "money" or the like. It is better to use bright colors, so that the note could capture the attention of the victim. Than take a cardboard box, cut away its bottom, and stick the painted sheet of paper on it. Put the box on the cupboard or cabinet, which is higher than a person. Fill the box with confetti and wait.

The victim enters the room and sees the box. If the person doesn't see it, you try to pay his attention to it, or ask to give you some "money" from that box.
To take something out, he would have to take the box from the cupboard…

The firework of confetti is waiting for him!