Weird hand, how bad/spewy is this?

I never play tournaments, so here goes.

$250 tourney, 5,000/10,000 blinds, ave stack is 400k, I have 300k. 30bb. 40/450 players left. 20k up top, 500 if I bust this hand. There have been no limps at our table, this hand UTG(250k) decides to limp. Weird. Im in UTG +1 with 88 and get worried and limp as well (bad play I know)

Big stack, table aggressor makes it 42k on the button. Short stack in BB goes all in for 38k. UTG limper thinks for a while and calls the 42k. I decide to go all in for my 300,000. Is this ok, bad, really bad?