Overbet donk shove??? WTF?

[Etats360]

Villian seemed donkish, only sat down a few orbits ago. I think I had him at like 35/5/0.4 over 30 hands or something. I haven't seem him do anything notable.

Poker Stars, $2/$4 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

BB: $81.50
UTG: $217.80
Hero (MP): $589.60
CO: $623.45
BTN: $480.45
SB: $201.20

Pre-Flop: J[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] dealt to Hero (MP)
UTG calls $4, <font color="red">Hero raises to $20</font>, 2 folds, SB calls $18, BB folds, UTG calls $16

Flop: ($64) 8[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/spade.gif[/img] (3 Players)
<font color="red">SB bets $181.20 and is All-In</font>, UTG folds,