most painful hold?

I just wanted to see what you guys think is the most painful hold/lock that you've experienced. For myself, I would have to go with the shinlock.

yeah, foot or ankle

but a cinched neckcrack will leave you FUCKED UP for weeks if not for life

I would say the can opener if a really really strong guy gets you in it and you are pinned against the wall and cant sweep.

I remeber the 1st time someone demonstrated a choke on me. I
thought my eyes were gonna pop out of my head! Now i don't think
twice about it, but that 1st time ever really stays with ya :)

yup, getting tapped by a choke is different than LETTING someone demonstrate a perfect choke that is sunk in technically