He flops bottom pair with a spade/bitch straight draw, turns the second nut straight flush, and rivers the absolute nuts of the nuts.
PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed)
Hand History Converter Tool from
FlopTurnRiver.com (Format: FlopTurnRiver)
saw flop|
saw showdown
Hero (t8798)
Button (t18471)
SB (t3041)
BB (t11603)
UTG (t6535)
UTG+1 (t2250)
MP1 (t4205)
MP2 (t3145)
MP3 (t3215)
Preflop: Hero is CO with 4

, 5

.
3 folds, MP2 calls t200, MP3 calls t200, Hero calls t200,
1 fold, SB completes, BB checks.
Flop: (t1000) J

, Q

, T
(5 players)
SB checks, BB checks, MP2 checks,
MP3 bets t400, Hero folds, SB folds, BB folds, MP2 calls t400.
Turn: (t1800) K
(2 players)
MP2 checks, MP3 checks.
River: (t1800) A
(2 players)
MP2 bets t600,
MP3 raises to t1200, MP2 calls t600.
Final Pot: t4200
Results in below:
MP2 has 7h 8h (straight, ace high).
MP3 has 9s Js (straight flush, ace high).
Outcome: MP3 wins t4200.