[[A person is standing on a chair with a mobile phone in one hand and a pineapple in the other. Another person is standing behind them.]]
Person 2: Why are you standing on a chair holding a pineapple?
Person 1: 
I wasn't getting good reception but now I am!

The erratic feedback from a randomly-varying wireless signal can make you crazy.

{{Title text: A new study finds that if you give rats a cell phone and a lever they can push to improve the signal, the rats will chew on the cell phone until it breaks and your research supervisors will start to ask some questions about your grant money.}}