How not to save a file

This morning while assisting a patron with saving a file to her flash drive I had a moment of idiocy.

I sat next to the patron grabbed the mouse and set about trying to get that file saved. As I am explaining the process I notice that the arrow wouldn't move. At first I was thinking the computer froze. After a few seconds I realized that no, it's not frozen, something else was wrong. I was more aggressive moving the mouse this time maybe the little roller was jammed. It was then that I discovered the problem. I was using her cell phone.

Oh yes. I am that stupid. Luckily she found it amusing. I am surprised that she was still willing to allow me to show her how to save her file.