Weird $215 hand

[hansarnic]

First hand of Level 1.

UTG min-raises and we get four callers to me on the button with K [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/heart.gif[/img]. I call and BB calls.

Flop is J [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/spade.gif[/img] 6 [img]/images/graemlins/heart.gif[/img].

It's checked to me. Rather stupidly I bet 180.

BB now does a weird re-raise to 450 straight and UTG pushes. Everyone else folds back to me.

Never seen either of these two before. What do you do & why?