Flop trip Aces, but face huge bet in small pot

[Genesis]

Ultimate Bet - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker (http://www.legopoker.com) Hand History Converter (http://www.legopoker.com/hh))

Didn't have HUD on at the time, but remembered CO from previous play as being tight.

SB: $4.75
BB: $30.15
UTG: $13.53
MP: $15.67
CO: $27.23
Hero (BTN): $53.42

Preflop: Hero is dealt A/images/graemlins/diamond.gif 6/images/graemlins/diamond.gif (6 Players)
UTG calls $0.25, MP calls $0.25, CO calls $0.25, Hero calls $0.25, SB calls $0.15, BB checks

Flop: ($1.50) A/images/graemlins/club.gif 7/images/graemlins/heart.gif A/images/graemlins/heart.gif (6 Players)
SB checks, BB checks, UTG checks, MP checks, <font color="red">CO bets all-in for $26.98</font>,

What do I make of this huge bet?

[vixticator]

I can't see anything he would do this with, it SEEMS like Khxh would be more likely than anything but I can't call, kicker is pretty terrible. Prob calling AT+.

[KRE8R]

I see people do this with like AT or AJ or something knowing full well that the other person with the fourth Ace is calling 99% of the time. Its possible he has 77 but whatever. As far as calling or not...feel like gambling??