Im completely clueless about this villian:
flop:
easy cbet with my set, hoping someone hit.
turn:
villian calling me otf i put him on mid sc a flushdraw or maybe a strong combodraw, when the flush completed and i hit my FH i checked to him to give him the opportunity to go broke if he made his flush.
I decided to 3bet him so whould wouldnt have to call a potsized bet otr.
now the whole thing the lets me question my mental sanity, the river:
River is basicly a blank on that board, i bet into it beeing quite sure he will call after calling the checkraise on the turn.... but he folded?? 
Did i just ran into a mega fish or am i the fish to bet the river?
I cant imagine a player first bluffing the turn, than calling a c/r and folding the river? I just dont get it.
What hands could he play like this? AA? KK? thinking i have nothing on the turn on that board? Or could he play 56, 67 that was, maybe 6s for a combo draw? Thinking about it i can only imagine he had 6s7x. Pretty much the only hand to play it this way.
Poker Stars, $0.05/$0.10 No Limit Hold'em Cash, 9 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.
BTN: $5.98 (59.8 bb)
SB: $15.70 (157 bb)
BB: $11.73 (117.3 bb)
UTG+1: $36.63 (366.3 bb)
UTG+2: $12.68 (126.8 bb)
MP1: $17.62 (176.2 bb)
Hero (MP2): $42.55 (425.5 bb)
MP3: $14.25 (142.5 bb)
CO: $23.99 (239.9 bb)
Preflop: Hero is MP2 with 5
5
3 folds, Hero raises to $0.30, 2 folds, BTN calls $0.30, SB folds, BB calls $0.20
Flop: ($0.95) 4 5
7 (3 players)
BB checks, Hero bets $0.60, BTN calls $0.60, BB folds
Turn: ($2.15) 4 (2 players)
Hero checks, BTN bets $1, Hero raises to $2.50, BTN calls $1.50
River: ($7.15) J (2 players)
Hero bets $2.60, BTN folds
Results:
Spoiler
$7.15 pot ($0.32 rake)
Final Board: 4 5 7 4 J
BTN mucked and lost (-$3.40 net)
Hero mucked 5 5 and won $6.83 ($3.43 net)
