Help In The Lab

A lab supervisor was on duty in the university's computer lab on a quiet
afternoon. He noticed a young woman sitting in front of one of the
workstations with her arms crossed across her chest and staring at the
screen.

After about ten minutes he noticed that she was still in the same
position only now she was impatiently tapping her foot.

He went up to her and asked if she needed help; she turned to him and
replied, "well, it's about time! I pushed the HELP button over fifteen
minutes ago!"