JJ deep overpair against 56/15 aggrodonk

[Jurrr]

6-handed.

Hero is UTG with J[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/heart.gif[/img] and covers.

MP is 56/15/1.6(400) with 52% (!) won when saw flop, 42% att to steal blinds, 34% folded BB to steal. MP has 214BB. My read is that he is retarded, floaty and bluffy.

BB is also a LAGtard though has more brains.

Hero raises to 3.5BB, MP calls, 3 folds, BB calls.

Flop T[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/heart.gif[/img] (11BB)

BB checks, Hero bets 8.4BB, MP calls, BB calls.

Turn 2[img]/images/graemlins/heart.gif[/img] (36.2BB)

BB checks, Hero checks (I figure they may give up their float with a double barrel and I can let them do some betting), MP bets 72BB, BB folds, Hero...?

WTF? Why is he betting so much? If for some reason I call and he shoves a blank river for 130BB for a 440BB pot am I calling?