It wasn't within arms reach. The number of steps away that the OP took has changed a few times throughout the story, but it wasn't within arms reach. Even if it was, he grabbed the bass out of the guy's hands. That was the douschiest move of the whole debacle.
Indeed, not really arguing that - I personally wouldn't get into a physical confrontation over an Epi Goth Thunderbird, or anything else for that matter. I just don't believe everyone would be as restrained as they claim if something similar happened to them, particularly with the mentality that music shops are some sort of uncivilised free-for-all where just because I have taken my hands off something for a second, it makes it ok for someone else to snatch it without at least asking if I still intend to purchase it. The shopping trolley analogy is a good one - if I leave it unattended for a second/minute to grab something off a shelf, does that make it ok for someone else to wheel it off?
