Does anyone know why this would happen during an ultrasound?

I’m trying not to be too paranoid but I just wondered if anyone knew why this happened. My ultrasound tech had someone training under her today and she let the new tech use the ultrasound machine on me at one point during the scan I’m assuming to gain more practice. Anyways she was kinda rough with my tummy and also I noticed the probe was getting really warm when it hadn’t been with my original tech. She shut it off after about 5 minutes of doing this and the original tech came right back around and checked a few morning things and the same probe wasn’t super warm anymore. I’m probably looking too much into this but I’m now just concerned the new tech didn’t know what she was doing and had the frequency up super high or something 🥴 I wish I would’ve said something while I was there or just asked about it. Does anyone know why it would heat up? Could it hurt the babe?