Under no circumstances should you wander outside of the cab of the UP GP38 on Peninsula Corridor. Whilst doing the"Rocky Road" scenario, I was bored doing 10MPH so decided to do what i've seen some American engineers do and walk out of the cab and cross over to the other unit. What I didn't expect was for the game to prevent me from re-entering the driver's cab because apparently my head is too big to fit through the door. Suddenly 10MPH felt like 100MPH as I frantically tried to fit through the door to no avail. Fortunately I could just barely reach the brakes and stopped what could of been the most embarrassing crash in railroad history. Once the train stopped I could enter the cab again. So yeah, don't do that.