that's a good question. I'll try and get to the bottom of it.....it kinda is feeble being that it's between two of the easiest tricks board slide and 50-50...
i swear i saw a caption of dave crabb doing one on a curb and it said grapefruit grind, but it may have actually been some sort of losi type move ie. it was switch?. If it was, how the hell did he do it on a curb back then, or the caption could have just been wrong....
I've mentioned this before but i always wondered why a manual is called a manual. The flip team came to my town years ago and I didn't feel like watching what I though was the next Daveed (Curren and Louie), and so I got to talk to Lance and ask him a bunch of questions.
Rolling out and rolling in on four wheels is automatic, rolling out and rolling in on two wheels is manual. Like a car... of course Neil Blender made it up.....