A 17 year old would generally be expected to respond rationally to an event. Do we believe that Zimmerman, the overweight man in his 30s overtook the 17 year old football player? How did Zimmerman come to encounter Martin face to face?
I witnessed my dad, who was in his 40’s at the time, incapacitate a younger man who outweighed him by a good 60 to 80 pounds and was 8 inches taller than my dad. In high school I witnessed a friend knock another guy completely on his ass by reaching across a picnic table and hitting him. The other guy was over 300 pounds. My friend weighted around 180. In pro-football we’ve all seen a 5 foot 8 inch running back knock down a defensive lineman well over 6 feet and weighing near or over 300 pounds. But, I digress.
It was stated up-thread that Martin was walking towards his destination, still on the phone with his girlfriend, when Zimmerman caught up to him. Martin's last words, which she heard, were addressed to Zimmerman: "Why are you chasing me?"