Mid Pockets

[Chasinjason]

Is it worth it to call an all in with mid pockets on your blind on the bubble?

Today I had 88 twice on my big blind with 4 left, mid stack both times with everyone around the same stack level. I called both times as the raiser was from the sb, and I put him on ax. Once I was correct and lost, other time was a coinflip, he had aj and i lost again.

I hate calling all ins but it seemed worth it. I'm wondering if the small edge you most likely have is worth the risk?

Any thoughts?