Sources tell TMZ ... Weston was at The Farmer's Kitchen in Hollywood at around 4:00 today, when his trainer told him he couldn't eat something on the menu. For some reason, we're told Weston went off and started pushing the trainer in a violent way, at one point trying to roundhouse the trainer.
The trainer took Weston down, and someone else tried calming Nic's son down, to no avail. Weston got up and continued freaking out.
