The Dinobots thought about following the man who left, but realized that they were too big and would be noticed immediately. To them, this whole situation of being stuck inside to avoid detection was excruciatingly dull. To warriors who excelled in combat, doing nothing was the worst kind of event. It allowed them to think about how things would go wrong. In combat, they could just forget about their worries and focus on killing the opponent before it killed them.