200NL - flush facing weird action when board pairs

[gjim]

First orbit at the table and villain is unknown. I've seen him limp a previous hand so I was assuming hes generally passive.

Poker Stars, $1/$2 NL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

SB: $218.65
BB: $234
UTG: $516.10
Hero (CO): $199
BTN: $346.15

Pre-Flop: 7[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] dealt to Hero (CO)
UTG calls $2, <font color="red">Hero raises to $10</font>, 3 folds, UTG calls $8

Flop: ($23) J[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/spade.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $16</font>, UTG calls $16

Turn: ($55) 5[img]/images/graemlins/heart.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $38</font>, <font color="red">UTG raises to $76</font>

Snap fold or snap shove?

Min reraises from unknowns always confuse me. His flop play to this point seemed consistent w/ how a passive player would play a set, but I dont know if hes the type to limp JJ and there arent many other set combinations. I guess bigger flushes are out there, but it seems like an odd card to suddenly wake up and start betting on. All that said, its a minraise which could mean any number of things depending on the player and people just do weird [censored] sometimes.