I've been a little derelict in my self-reporting of ugliness lately, so here's a couple of hands where my operating system crashed.

This one's from the Pavlicek I'm Not set.  At favorable, Righty opened 2 Hearts and it was up to me

76 / 86 / QT8765 / A73

I glanced at the opponent's bid and somehow saw 1 Heart.  I make a lot of mistakes in this game, but not registering what the opponents have bid hasn't ever (that I recall) been one of them. So I made the aggressive 'jump overcall' of 3 Diamonds and then immediately saw what I had done.  Lefty bid 4 Hearts and I prayed that Jeff didn't have a bid, but he was in there for 4 Spades.  That got passed around to LHO who whipped (with AKJTx of Spades and a 17 count, he didn't know WHAT was going on.)  Luckily, Jeff didn't have the right hand to send it back.

Could have been sticks and wheels, but Jeff played it well and the defense was pretty bad and he got out for -500.  4 Hearts makes double dummy, but might go down if declarer misguesses QT9xxx vs Axx (KJ offside).  As I reported when I mentioned the hand on Tuesday, we lost most of an IMP (-0.67) on the board. 

The other hand was from the set with Glen I was in 4 Spades with:

AKJT / 3 / A765 / KQ75 Dummy

Q964 / T2 / KQJ8 / T84

JZ, who had opened 2 Hearts (alerted as 0-13,) led a Diamond.  I won in hand, drew trumps in 3 rounds, and then cashed all my Diamonds (JZ's lead turned out to be a singleton,) ending in my hand.

Of course now I didn't have the entries to pick up Clubs for only one loser (Axx onside) and held myself to 10 tricks.  Not an expensive mistake, but I felt like I got caught flying low.  No real harm done (an IMP,) but still embarrassing.