There is, indeed, only one way to find out. If it is a trap it will do no more or less harm to them than staying put would, so they might as well take the chance that it is a way out of here.

He pushes down whatever doubt or fear he might be feeling and follows after Finnick. The relief that floods him when he finds that it was not a trick almost knocks the air out of him.

"That was too close for comfort..." he says as he takes some time to try to force his body to relax.