<human>: So I was at the YMCA on the stair-stepper when I decided to put both my feet on one foothold and pull myself back and forth with my hands. Then, this grouchy old lady who works there came over and stood right by me while I started to do it normal again. After fifteen seconds of this she says, (with a stupid smirk on her face) "Don't you think your too old to be using the equipment incorrectly?" I reply by saying sure and she strides back to her computer perch where she can keep a decrepit eye on the room. 

  Five minuets later I decided to get my revenge. I slowly snuck from the stair-stepper, to the treadmill, and to the bike, until I was pedaling comfortably by her computer. After studying her computer in the mirror, I waited until she was refilling the gym wipes, which were away from her computer, to take my revenge. I stood up and quickly unplugged her mouse. 

  After I circled back through the weight room and got back on my original stair-stepper, I was able to witness the aftermath. She was violently shaking her mouse for at least minute before she stood up and took another minute plugging it back in.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Snide old lady yells at me, she gets to try to figure out why her mouse isn't working for two minuets.