This really gets me pissed. My dad took my brother, and I to Vegas years ago when I first came home from Iraq. This happened to us. We were on a bus when a pregnant lady got on. I was gonna get up to give her my seat, but with my injuries, my brother said "Let me". So he did... Then, when he got up, another dude (who had been standing) sat down in his seat right beside me. I went ballistic. Actually grabbed the asshole and threw him in the isle. Almost started a big fight. Lady got all nervous, but we preictally "made" her sit down. I felt bad for the way I handled it, but that fucker needed to learn. Everyone on the bus got so quiet so fast. Surprised the cops didn't get called on us.