我第一次尝试扔回旋镖时，它飞了一圈又回到了我手中。

When I first tried throwing the ___boomerang, it flew in a circle and came back to my hand.

他对朋友开的恶意玩笑最终自食其果，因为没人再信任他了。

His mean joke ___boomeranged when no one trusted him anymore.