Interesting short stack bubble hand

[Gramps]

Big stack has been aggressive but not "antisocial" or anything, no "macho battle for big stack status" between the two stacks either - both seem pretty rational. Not sure if other short stack would be sharp enough to go all-in on top of my limp here with the bigger short stack (with a wide range of hands, knowing I'd have to beat two hands to stay alive, and knowing that even if he loses to me but beats BB he still has 220 chips) - he's one of those frequent mini-raiser/kind of loose types (pre-bubble) - so that's a bit up in the air as well. I wouldn't eliminate the possibility (although somewhat low) of stack #2 limping behind with some hands and checking down as well (again, both big stacks are rational non-donks).

Hand converter ain't working right now...

Blinds(250/500)
UTG (Hero) - 280
Button - 4120
SB - 390 (140 after posting)
BB - 5210

Dealt to Hero [ Kd Ah ]

Hero (thinks a long arse time) and folds...