hand reading question

villian is unknown to me but i normally classify unknown as 'solid' or 'tag' until they prove otherwise.

i'm not a limit player predominantly but i am a decent NL handreader but this hand really puzzled me. i put him on ace high until he checkraised me. is it most likely he rivered a better pair and is going for a sick value cr? does anyone call here getting 8:1?

PokerStars Game #7704633935: Hold'em Limit ($50/$100) - 2006/12/31 - 22:49:25 (ET)
Table 'Veronika' 6-max Seat #2 is the button
Seat 1: wwbbd ($3090.50 in chips)
Seat 2: Grimstarr ($1925 in chips)
Seat 4: 7thKid ($1295 in chips)
7thKid: posts small blind $25
wwbbd: posts big blind $50
*** HOLE CARDS ***
Dealt to Grimstarr [2c Qc]
Grimstarr: raises $50 to $100
7thKid: folds
wwbbd: calls $50
*** FLOP *** [2d 8h 8c]
wwbbd: checks
Grimstarr: bets $50
wwbbd: calls $50
*** TURN *** [2d 8h 8c] [5d]
wwbbd: checks
Grimstarr: bets $100
wwbbd: calls $100
*** RIVER *** [2d 8h 8c 5d] [4h]
wwbbd: checks
Grimstarr: bets $100
wwbbd: raises $100 to $200
Grimstarr: