Came across this common situation today that I figured I should share about reading maniacs.  

The guy too my left was a maniac betting on every street non-stop.  A quick tip on reading maniacs - when they actually do have a strong hand/monster, they slowplay it.  They love to 3-bet big hands preflop and then check-back the flop.  So if you ever see a maniac take this line and then start betting weird on the turn/river, be concerned that they have a strong hand.  Or use it to your advantage if you have some implied odds to see another card.  Hence why calling his min 3-bet preflop with 55 is profitable, since I'll often times get to see a free turn card as well if he has a strong hand.

Here's the hand in question (or watch it on our replayer here):

***** Hand History for Game 9482301637 *****
$1,000 USD NL Texas Hold'em - Friday, July 30, 13:09:02 EDT 2010
Table Table 177387 (Real Money)
Seat 6 is the button
Total number of players : 6/6 
Seat 3: Hero ( $1,112 USD )
Seat 6: Lillifee ( $3,096.10 USD )
Seat 2: MaxleR ( $2,314 USD )
Seat 1: Rank1 ( $1,103 USD )
Seat 5: ineedtp ( $1,000 USD )
Seat 4: sayal13 ( $460.11 USD )
Rank1 posts small blind $5 USD.
MaxleR posts big blind $10 USD.
** Dealing down cards **
Dealt to Hero 5h 5d 
Hero raises $30 USD
sayal13 raises $50 USD
ineedtp folds
Lillifee folds
Rank1 folds
MaxleR folds
Hero calls $20 USD
** Dealing Flop ** 2s, Kc, 3h 
Hero checks
sayal13 checks
** Dealing Turn ** 5s 
Hero checks
sayal13 bets $30 USD
Hero raises $130 USD
sayal13 calls $100 USD
** Dealing River ** Td 
Hero is all-In $932 USD
sayal13 is all-In $280.11 USD
Hero shows 5h, 5d three of a kind, Fives.
sayal13 doesn't show As, Ac a pair of Aces.
Hero wins $651.89 USD from the side pot 1 with three of a kind, Fives.
Hero wins $932.22 USD from the main pot with three of a kind, Fives.