Opponent is pretty wild. First time I've seen this call/call/bet line from him. Is this a raise (just shove instead so I don't have this decision maybe)? Can I call the shove? I'm inclined to think this is QJ+ until the river shove... then I'm not sure.

Some other showdown hands... he c/r'd middle pair on an Ace high flop and called a 3bet (I shutdown with air), called two barrells with middle pair and checked trips on river (I checked behind top pair), called 3 streets with TPNK vs my TPGK on paired board, called 3 streets with bottom pair on AK877 board, etc.

Poker Stars $0.25/$0.50 No Limit Hold'em - 2 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

Hero (BTN/SB): $53.45
BB: $115.45

Pre Flop: Hero is BTN/SB with 8 7
Hero raises to $1.50, BB calls $1

Flop: ($3.00) 3 7 6 (2 players)
BB checks, Hero bets $2, BB calls $2

Turn: ($7.00) Q (2 players)
BB checks, Hero bets $4.25, BB calls $4.25

River: ($15.50) 7 (2 players)
BB bets $7.50, Hero raises to $17, BB raises to $107.70 all in, Hero calls $28.70 all in

Your hand is pretty much a bluffcatcher once he 3-bets the river, right? You could so easily have AA/KK here, can't really see him doing this with AQ, and worse 7's are so unlikely. Still I doubt I could fold but it looks like it might be something to consider since it really doesn't look like you're folding so he'd have to be pretty crazy to try.