dkl65:
Hello!
One time, before I knew how to correctly measure a current using a multimeter (or understand how current works), I tried to measure how much current the 5V pin of the Arduino can give off. I attached the red lead of the multimeter to the 5V pin, and the black lead to the GND pin.
Whoops. First, let's make sure we are actually measuring what we think we are measuring. Also, please never try to measure current this way on any device capable of more hurt than USB.