The first time I was ever busted was way back on my first day of high school. It was between classes and my friends had dared me to prank one of the ladies in the hall, a senior no less. They had dared me to flip up her skirt. Me being a young and rather foolish individual at the time accepted their dare. So I snuck up behind the senior, grabbed the bottom of her skirt on both sides and lifted it up over her waist.
Someone there alerted her to what was happening soon enough and she quickly pulled her skirt back down and turned to face me. Without a word she reached down and grabbed for my groin. She managed to get hold of both my balls, right through my loose shorts and the briefs underneath. My nuts in the palm of her right hand, I was in a complete panic, unsure of what she was actually doing to me. Between having seen her skirt lifted straight up and then the senior touching my privates directly, I was very turned on.
Next thing I knew she was squeezing my nuts incredibly hard and I quickly lost whatever boner I might have been developing. She was relentless and cruel about it I guess. We had an audience thanks to the people noticing the prank I had pulled, so all eyes were on me while my balls were being busted. She was squishing them unmercifully hard, tugging and twisting them as she did so. I tried to get her hand off me, grabbing at her wrist with both of mine, but that only made her crush my balls even more severely.
I'd like to say I noticed if people were laughing at my expense while this was going on, but I was focusing too much on the pain she was causing me. That and seeing her very angry face right in front of mine. I'm not precisely sure how long she squeezed my balls, but it felt like an eternity. From what my friends told me afterwards, it was probably about a minute or two.
Eventually she was satisfied and let my balls. I fell back up against a wall, gently holding my balls with both hands as I tried to remain standing. She walked off without a word, leaving me to tend to my swelling nuts. At that point I noticed that people were indeed laughing and pointing at me. Safe to say that while the senior was the one initially embarrassed, she turned it all around on me. Nobody was talking about what happened to her after that, just that she had busted my balls severely.
Anyways, I was extremely late for class. Mainly because I had headed to a bathroom to check myself over and wait for the pain to die down. I didn't dare use what really happened as an excuse for why I was tardy, so I got in some trouble then. My balls, meanwhile, continued to ache until well after I had returned home after school.
The next day I worked up the courage to find the senior and apologize for what I had done (I was worried she might grab me by the balls again, or just hit them). Thankfully she accepted my apology and said she was sorry for squishing my testicles the way she had. After that we did manage to get along for the most part and hung out sometimes until she graduated at the end of the year. Sadly some people continued to make fun of me for being publically busted like that on my first day, but she was not one of them.