To be honest, my favorite finish EVER has got to be Frye v Shamrock at Pride 19....dear god....still gives me chills to watch.
Entire Fight:
http://www.dailymotion.com/visited/s...s-ken-shamrock

Quick HL:
[youtube=425,350]_gf_HCrYDdI[/youtube]

Definately worth watching the entire fight if you have the time. After such a long even fight, to have it end for almost an entire minute with two guys just wrenching the hell out of the ankle locks on each other. Both guys had them sunk in deep, but neither would tap. Frye actually wound up having his ankle broken, but still refused to stop fighting, and actually won the decision.