Does anyone folds here trip 7?

[DrLAXLAX]

Shorthanded 0.25/0.50$ blinds NL.
Hero 67$ and has table covered.
I limp with 77 in MP. Flop 7910 rainbow (pot 2.5$) 5 handed.
First seat bet pot, I raise to 8$, all folds.
First seat calls. Turn is Q. He go allin for 49$ ! Hero?