Only 30 hands on this guy and have not seen hem do anything weird. Notice the preflop cold call (original raised folded)

Party Poker No-Limit Hold'em, $ BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($695.60)
MP ($513.94)
CO ($646.65)
Button ($591)
Hero ($594)
BB ($707.78)

Preflop: Hero is SB with K, A. Hero posts a blind of $3.
1 fold, MP calls $6, CO raises to $30, 1 fold, Hero (poster) raises to $99, 1 fold, MP calls $96, CO folds.

Flop: ($240) K, A, J (2 players)
Hero bets $177, MP raises to $390 (he has like 20 behind)