Bubble Shortstack all-in, hero w/ nut flush draw

[jgunnip]

***** Hand History for Game 2485669920 *****
NL Texas Hold'em $20 Buy-in + $2 Entry Fee Trny:14585454 Level:5 Blinds(75/150) - Saturday, August 06, 01:01:00 EDT 2005
Table Table 13833 (Real Money)
Seat 10 is the button
Total number of players : 4
Seat 2: hero ( $2590 )
Seat 3: Dextermn8r ( $2480 )
Seat 8: Obi_Wan1 ( $310 )
Seat 10: goin_allin ( $2620 )
Trny:14585454 Level:5
Blinds(75/150)
** Dealing down cards **
Dealt to hero [ Ad 7s ]
Obi_Wan1 is all-In [310]
goin_allin folds.
hero calls [235].
Dextermn8r calls [160].
** Dealing Flop ** [ 8d, 4d, 5d ]
hero checks.
Dextermn8r is all-In [2170]
hero calls [2170].


I felt this was an easy decision since hitting the draw or an ace likely win the hand and give me a big advantage going HU.