Biggest swings in one session?

[DesertCat]

So I'm up 45BB in my first four hours yesterday at Casino AZ 6/12, and I'm thinking, I'm clearly getting way good. I'm so much better than the other players at my table it's ridiculous. I start planning my eventual march through the mid and high limit games, since clearly it's all come together for me. I am a poker master.

Two hours later I leave the 6/12 table only up 7BB, and I feel like I've been repeatedly punched in the gut. By then, everyone at my table was better than me. I was so bad I even tried to bluff Lorainne, the 70 year old unbluffable calling station, while she held pocket aces.

It's the worse feeling I've ever had in a winning day. Anyone have any worse swings in a single session?