Please help me with this possible injury?

[Dean]

I was in my college gym and I got onto a rowing machine. The person using it before me had left the handlebar up and I couldn’t reach it straight ahead. When I was trying to reach it the person rowing next to me without saying anything gave me a sudden hard push forward, and I felt about two crackles (kind of like the feeling of joints crackling) toward the left of the my hip area (because he was on my left). After doing a bit of my own research, I think it was even more to the left than the sacroiliac joint and I’ve never felt a crackle in that area before, even when I mimic the action, so he must have really pushed me way out of my range of motion. I’ve uploaded a photo showing to the best of my memory where I felt the two crackles. I didn’t feel pain at the time, so please tell me if it could have been; nerves, tendons, or muscles snapping or tearing, bones breaking, tendons or muscles passing over each other, etc.

http://img91.imageshack.us/img91/1534/skinmaleposteriorwebwz7.jpg