Am I pot commited or not?

[TakenItEasy]

I ran into a very strange situation Saturday.

Live, blinds at $600/$300/$75, 8 handed, avg stack is around 8,500

I lost the last hand and only have $900 after posting the SB and ante.

folded to button who pushes. Button who is also fairly short with say 4,000 is covered by BB who has maybe 8,000.

Button and BB have some understanding of pushing wide ranges but are almost certainly tighter than the pushbot charts. I'm sure each are aware of my criticle stack as well.

I look at my cards, more for BBs benefit, expecting to push and see 72o.

Push or Fold?