My grandpa always does this prank to people.Its funny to see peoples reaction.
This is my first Instructible, so please tell me how I could improve it.

Step 1: Tools Needed

A Cup.

Step 2: Making the Hole

Make a hole on the bottom of the cup.

Step 3: Thumb Through Cup

Put you thumb through the cup, then show someone what you found in it, and say something like "You wont believe what I found in my drink when I was done". You should get a reaction that will make you laugh.