easy river fold vs. unknowen?

[praios]

Full Tilt Poker Game #3734539629: Table Peartree (6 max) - $0.50/$1 - Pot Limit Omaha Hi - 12:15:59 ET - 2007/10/02
Seat 1: Max1956 ($65.35), is sitting out
Seat 2: willett1981 ($55)
Seat 3: PrimeFknTime ($240.85)
Seat 4: axelf82 ($180.60)
Seat 5: ihateFTPmip ($108.90)
Seat 6: Woolworths ($35.40)
axelf82 posts the small blind of $0.50
ihateFTPmip posts the big blind of $1
The button is in seat #3
*** HOLE CARDS ***
Dealt to axelf82 [8c Ad Kd Jd]
Woolworths folds
willett1981 folds
PrimeFknTime folds
axelf82 raises to $3
ihateFTPmip calls $2
*** FLOP *** [Ts Qd 8h]
axelf82 has 15 seconds left to act
axelf82 bets $4
Max1956 stands up
ihateFTPmip calls $4
*** TURN *** [Ts Qd 8h] [2c]
beeroney sits down
beeroney adds $40
axelf82 has 15 seconds left to act
axelf82 bets $11
ihateFTPmip calls $11
*** RIVER *** [Ts Qd 8h 2c] [8s]
axelf82 checks
ihateFTPmip bets $20
axelf82 has 15 seconds left to act
axelf82 folds
Uncalled bet of $20 returned to ihateFTPmip
ihateFTPmip mucks
ihateFTPmip wins the pot ($34.20)
*** SUMMARY ***
Total pot $36 | Rake $1.80
Board: [Ts Qd 8h 2c 8s]
Seat 1: Max1956 is sitting out
Seat 2: willett1981 didn't bet (folded)
Seat 3: PrimeFknTime (button) didn't bet (folded)
Seat 4: axelf82 (small blind) folded on the River
Seat 5: ihateFTPmip (big blind) collected ($34.20), mucked
Seat 6: Woolworths didn't bet (folded)