While stopped at a red light I thought a car was rolling back into me. I took my brain a hot second to realize maybe I was rolling forward into him? But no, I told myself, my foot was on the brake and was pushing as hard as I could once I thought it was me (yep, should have hit the parking brake, but it all happened super-fast). I rolled into him, the light turned green and he pulled ahead, I got aside him rolled window down to ask if his vehicle was standard as I was still convinced he rolled back into me. Needless to say he said no and pretty much ripped me a new asshole for tapping him - I apologized and said "i thought you rolled into me". Brake hold is always on but I was not using the hold, my foot was on the pedal (pushing like a madwoman at one point).