Thanks everyone for your help! I have to say you're all wrong though! You are definitely able to crouch and turn while remaining crouched on the actual cabinet. I played it to death in the 80s and our local retro arcade recently borrowed an original cabinet which I played last month! https://youtu.be/IqNzdiunf_U See the above video around 5:14. I practically mastered the game back in the day and I'm itching to play it on my home systems but this glitch makes it unplayable. Can anyone point me in the direction of a fix or will it be impossible to correct?? Like I said it's possible on games like Robocop...