It's not actually a 'glitch' in the technical sense, but it's a very hard to pull off shortcut on Sol 2. I think people just call it a glitch to voice their disapproval of its use. First time that I have seen this and I think it shouldn't be shown in videos... the boards are bad enough already.
EDIT: Just so noone misunderstands... I'm not defending the use of it. I was just expecting something more weird when people mentioned glitches on certain tracks (eg. your ship glitches into having a permanent turbo or something lol). To me it looks like a mapping oversight by the devs... need more invisi walls!
BR after the mag? I can hardly do the 2nd BR after that... :O