pancrase? i thought pancrase allowed open-hand slap boxing?
BTW it didn't look lucky to me, it looked like a combination between the victor's good timing, and the losers poor reflexes.
edit- after watching it again, definitely nothing to do with luck, thats a great armbar. congrats on the win.
Yeah, throwing a leg into the air is a proper way to get into scramble fighting for top position. Running the pipe, or a leg trip almost always leads to top position.
So theres no scramble fighting when running the pipe or going for a leg trip? It's a proper technique and effective technique, see Richard Crunkilton vs Sergio Gomez (WEC 33). It is similar to the x-guard sweep with his leg over your shoulder and driving forward.
If you hold on like Marcelo vs. Pelligrino at ADCC 2007, but then it's a totally different technique than just throwing the leg in the air like the guy in the vid. If he had held on to the leg he probably wouldn't have ended up in an armbar.