Ok, while it took me a LOOOONG time to get to that level, I was as the same level as your buddy. The Scorpion move I used was called the "Feve Toss". I could beat the game using nothing but Scorpions arial toss. I got so good at it that I was faster then the computer.
(My nick name back then was Jonny Fever...long story that...hence, Feve-Toss)
Similiar story to yours...I was up at (What is now the Brunswick zone) on 75th street in Downers Grove. They had just gotten Street Fighter II Turbo on a big screen (Mitsu 50" with controllers about 6' away). Behind the players there was a crane game that had a mirror on it's back panel. I would crouch down behind the control panel with my arms crossed, and play Blanka in the reflection of the Crane Game. Then when people got pissy because I was showing off, I'd ask them to pick a button and only use that button.
Anywho, back to MKII. Mike Vinicour (I think I spelled his name right) was one of the #1 game testers for Midway back then, and we played together all the time at Just Games. He and I felt throwing was part of the game, and if I remember correctly Boon and Tobias put a code in there that when you typed out something on the controls, the game would say something like "Throwing Encouraged" and would yell something in mine or Mikes voice. I forgot even what it said...just something simple like "YEAH!" or "Take It!"
I need to look this stuff up again...it's sad that we had access to all this stuff, and I can't remember any of it anymore....
OK, Wink needs to buy an MKII machine, STAT!