I'm going to join the crowd talking about a flipped boat in Skull last year at 11k. Luckily it was the boat in front of me and not mine (which afforded me a nice vantage point), and I heard the same "it got really dark!" story from them when we pulled the passenger into my boat. That boat's guide got onto the bottom of his raft and grabbed a line we threw, but it wasnt until after the next rapid and with the help of another person on the oars that i was able to secure both boats in a small eddy to right it.
I am hoping for something in the 5-8k range this year over mothers day weekend.