LOL how little exactly are you LZ? I've never had trouble in the subway/tube/metro/underground but I'm just over 6'3". The only stories involve people trying to avoid buying a ticket and getting caught by the conductors in Budapest.
Oh actually one time I was at a Ferencváros vs Vasas match and on the way back I got in the wagon with all the Ferencváros supporters and all of them were singing and jumping up and down and the whole train was shaking
it was a wicked atmosphere and at every station the people standing on the platform were assaulted by a bombardment of plastic drinks bottles thrown through the windows lol