Maniac time

Speaking of William Hill, the first table I sat down at, I found myself on the left of a complete maniac - preflop raising almost every hand. My tactic against him was to reraise any decent heads up hand (any pair, most aces), and defend my blinds and to play hard any hit flop. It worked ok, but maniacs still make me nervous because they cost you big when they hit. Here is a typical hand:

Game #6365020713: Hold'em FL ($1/$2) - 2008/08/07 - 14:14:17 (UK)
Table "Tanzanite" Seat 6 is the button.
Seat 1: Fs3424 ($109.22 in chips)
Seat 2: Hero($41.30 in chips)
Seat 3: goldmine ($69.70 in chips)
Seat 5: tulku ($40 in chips)
Fs3424: posts small blind $0.50
Hero: posts big blind $1
----- HOLE CARDS -----
dealt to Hero[4s 7s]
goldmine: folds
Fs3424: raises $1.50
Hero: calls $1
----- FLOP ----- [2h 8s 4c]
Fs3424: checks
jiwa76 joins the table at seat #6
Hero: bets $1 (2nd pair looks good to me)
Fs3424: calls $1
----- TURN ----- [2h 8s 4c][3h]
Fs3424: checks
Hero: bets $2 (still good)
Fs3424: calls $2
----- RIVER ----- [2h 8s 4c 3h][8c]
Fs3424: checks
Hero: bets $2 (can't see any hand beating me except a better 4)
Fs3424: calls $2
----- SHOW DOWN -----
Hero: shows [4s 7s] (Two Pairs, Eights and Fours, Seven high)
Fs3424: mucks hand [Js Tc]
Herocollected $13.30 from Main pot
----- SUMMARY -----
Total pot $14 Main pot $13.30 Rake $0.70
Board [2h 8s 4c 3h 8c]
Seat 1: Fs3424 (small blind) mucked [Js Tc]
Seat 2: Hero(big blind) showed [4s 7s] and won ($13.30) with Two Pairs, Eights and Fours, Seven high
Seat 3: goldmine folded before Flop (didn't bet)