Just call me Gigabet

[Bullet_Dodger]

Discuss the validity of this play.

General Info:
Live $100 MTT
Blinds- 50/100
Runners~ 500
People Left~ 200
Hero's Hand- 7 [img]/images/graemlins/spade.gif[/img] 5 [img]/images/graemlins/club.gif[/img]
9- handed

Stack Sizes:

UTG- t1,500
UTG +1- t3,750
CO- t475
Button- t3,100
Hero (SB)- t4,000

UTG calls t100, UTG +1 calls t100, 3 folds, CO is all-in t475, Button calls t475, Hero is all-in t4,000.

Only reads had at the time was that UTG was a loose, creative player and CO was on tilt.