Give Me My Space!

I'm sitting casual on train, with my knee on the seat, reading. Big guy talking on his phone comes up to me, SNAPS HIS FINGERS, pushes my knee off and says "I'm sittin' here now." I retort- "You ARE? I don't think so. Keep your hands to yourself!!" He moves to the next seat and is still glaring at me with a look of death, as I type this. This may not end well... :)