GZ isn't the most well spoken person or the best at conveying what he means.
I've always had a knack for discerning what such people actually mean, and have helped clear up more misunderstandings between two parties than I can possibly begin to count...
I can't be sure but my feeling is that GZ meant:
Not that he literally, truly FORGOT he had a gun in the way emperus may be trying to make it sound, trying to make it sound absurd and unbelievable that is... I think he just meant that he was so accustomed to having the gun that it wasn't directly on the forefront of his mind as he got out of the car, and during perhaps some of the fight when he was dizzy and distracted by getting viciously beaten.
I also think when he said "skip" he didn't mean it like you're envisioning... some little girl spreading daisies from a basket skipping along... but rather, again... GZ expressing himself very poorly, I think I can envision exactly what he meant. Have you ever seen someone sort of do a hybrid between a run and a walk? Not talking about a jog, but where they will run a few paces, then walk a few, etc.
Think about all the variations you've seen of that sort of motion, and I think you'll be close to what GZ meant.
I still think the distance south of the "T" that they ended up at is easily accounted for by GZ instinctively trying to get away, but not seeing well or being very clear because of the daze he was in from the punch... and covering some distance that way. I can easily see Trayvon pulling at him, trying to stop him and force him to the ground, as he stupidly stumbles along, and that sort of motion could very quickly account for the kind of distance we see.
I will admit I don't have any idea how Trayvon's phone got south of Trayvon... I could suggest a few notions but I'll just admit that sort of puzzles me.
as for this claim emperus is making about humans and survival instincts... there are exceptions to everything, and being drugged up on purple drizzank boyeeeeeeeeeeee will absolutely taint what might be normal human actions. Even within normal human actions you will see people who are hotheads, looking for an excuse to do violence... this is particularly common among young males, even moreso among young delinquent males on their third suspension... even moreso among young, delinquent, drug abusing, suspicious jewelry bagging males who like to pose thug style on their facebook, etc. COMPLETELY believable.
So you can talk about most people and most people not confronting, etc... but there are people that do shit like that. There absolutely are. We all know it, and I think Trayvon sized up GZ, saw he was a small doughy guy, a "cracka ass cracka bitch" etc... and I think he also looked like a pretty juicy target once he was out of his car, and off of his phone.
practice your MMA skillz, impress Deedee, have a good story for twitter later about beating some fool's ass... vent your frustrations about being on the verge of being KICKED OUT (not just suspended) at school, frustrations for getting "roped" for using weed... frustrations for 7-11 clerk not selling you a blunt, etc etc etc
100%, completely believable.
EDIT: I've also heard that model of pistol doesn't have a traditional safety and just requires a lot of squeeze or something, right?