When Terrorsaur deploys his shoulder cannons, they clip through his cheeks.
After Terrorsaur creates a cave-in, and Dinobot runs toward the screen to get away from the falling rocks, the "camera" actually passes into his head for a short time. This way, we can observe the detailing on the inside of his head's CGI model.
When Rattrap transforms from beast to robot mode, his rat-feet don't move. Instead, new feet appear out of nowhere on his back, and the original ones disappear.