That skinny little short guy could very well be a Navy Seals hand to hand combat instructor or an MMA champion.
Roberto Duran didn't look so tough when I once saw him in public so looks can be deceiving.
Have had the pleasure of watching a number of bullies making that mistake and it has never turned out well for them. The fact that such disputes are often made under the influence of too much alcohol only makes things worse.
It’s the manner in which a guy carry’s himself.
Body language should be considered when you decide who to pick on