Risk-free river bet

On Wednesday night, I won a monster pot on a risk-free river bet. You seldom see such things in poker. As a matter of fact, I didn't actually do the mental calculations to prove to myself that the bet was risk-free; however, I knew it all the same, deep down in my poker bones. Here's how it went down:

Table 'Lynx XI' 9-max (Play Money) Seat #9 is the button
Seat 2: (11200 in chips)
Seat 3: (49766 in chips)
Seat 4: (2155 in chips)
Seat 5: (8100 in chips)
Seat 6: (30400 in chips)
Seat 9: neostreet (41500 in chips)
Seat 2: posts small blind 100
Seat 3: posts big blind 200
*** HOLE CARDS ***
Dealt to neostreet [7s As]
Seat 4: calls 200
Seat 5: folds
Seat 6: calls 200
neostreet: calls 200
Seat 2: calls 100
Seat 3: checks
*** FLOP *** [5h 2s 6s]
Seat 2: bets 800
Seat 3: raises 800 to 1600
Seat 4: raises 355 to 1955 and is all-in
Seat 6: folds
neostreet: calls 1955
Seat 2: calls 1155
Seat 3: calls 355
*** TURN *** [5h 2s 6s] [Td]
Seat 2: checks
Seat 3: bets 2200
neostreet: calls 2200
Seat 2: calls 2200
*** RIVER *** [5h 2s 6s Td] [Qs]
Seat 2: checks
Seat 3: bets 12000
neostreet: raises 12000 to 24000
Seat 6 leaves the table
Seat 2: folds
Seat 3: raises 12000 to 36000
neostreet: raises 1145 to 37145 and is all-in
Seat 3: calls 1145
*** SHOW DOWN ***
neostreet: shows [7s As] (a flush, Ace high)
Seat 3: shows [2c 2d] (three of a kind, Deuces)
neostreet collected 80890 from side pot
Seat 4: shows [Qc 9c] (a pair of Queens)
neostreet collected 8820 from main pot

During current Hold'em session you were dealt 50 hands and saw flop:
- 9 out of 10 times while in big blind (90%)
- 10 out of 10 times while in small blind (100%)
- 26 out of 30 times in other positions (86%)
- a total of 45 out of 50 (90%)
Pots won at showdown - 7 of 11 (63%)
Pots won without showdown - 8

delta: $61,776
balance: $1,065,434