Ok, its a coinflip preflop, where we went all in. He didn't play it badly, and I figured he had AK anyway. But after the flop ... my god.

Note: 3rd hand of a tourney, the first I've played.
CARDSON
PokerStars Game #607380281: Tournament #2319381, Hold'em No Limit - Level I
(10/20) - 2004/08/11 - 00:21:21 (ET)
Table '2319381 1' Seat #3 is the button
Seat 3: kcollier13 (1470 in chips)
Seat 4: VI/XI/XCII (1480 in chips)
Seat 9: Joepa_1 (1500 in chips)
Seat 1: POKER MAD (1300 in chips)
Seat 2: BIGBEE08 (1490 in chips)
Seat 5: michael1123 (1500 in chips)
Seat 6: elwaysj7 (1300 in chips)
Seat 7: harrypokers (1770 in chips)
Seat 8: jimmydbach (1690 in chips)
VI/XI/XCII: posts small blind 10
michael1123: posts big blind 20
*** HOLE CARDS ***
Dealt to michael1123 [Js Jc]
elwaysj7: calls 20
harrypokers: folds
jimmydbach: folds
Joepa_1: folds
POKER MAD: calls 20
BIGBEE08: calls 20
kcollier13: folds
VI/XI/XCII: raises 280 to 300
michael1123: raises 1200 to 1500 and is all-in
elwaysj7: folds
POKER MAD: folds
BIGBEE08: folds
VI/XI/XCII: calls 1180 and is all-in
*** FLOP *** [As Jd 9h]
*** TURN *** [As Jd 9h] [Qs]
*** RIVER *** [As Jd 9h Qs] [Tc]
michael1123 said, "AHHHH"
*** SHOW DOWN ***
VI/XI/XCII: shows [Ac Kc] (a straight, Ten to Ace)
michael1123: shows [Js Jc] (three of a kind, Jacks)
VI/XI/XCII collected 3020 from pot

By the way, I just ran this through my poker calculator to make me more pissed.

Code:
Cards %win %lose %tie Pot equity Odds 
Js Jc 96.77 3.23 0.00 96.80% 30.25:1 
Ac Kc 3.23 96.77 0.00 3.20% 0.03:1