($22)Small stack all-in reraise

I have to call this, right?

#Game No : 3216268228
***** Hand History for Game 3216268228 *****
NL Texas Hold'em $20 Buy-in + $2 Entry Fee Trny:18356118 Level:4 Blinds(50/100) - Saturday, December 17, 11:56:09 EDT 2005
Table Table 67496 (Real Money)
Seat 2 is the button
Total number of players : 6
Seat 2: mblaylock ( $640 )
Seat 3: FRAZ1 ( $2095 )
Seat 4: madhtr ( $2025 )
Seat 6: kapioler ( $545 )
Seat 8: HERO ( $2145 )
Seat 10: P__HILTON ( $550 )
Trny:18356118 Level:4
Blinds(50/100)
** Dealing down cards **
Dealt to HERO [ Th Ac ]
kapioler folds.
>You have options at Table 66843 Table!.
HERO raises [300].
P__HILTON folds.
mblaylock is all-In [640]
FRAZ1 folds.
madhtr folds.
HERO?