How do you stop the construction workers in the twisted thicket?

First, put on the amulet. You have to catch up to the construction cars. You can turn into a goblin to do that. Then, jump on the last car and turn into a troll. Push over the wrecking ball stand so that's it is leaning sideways. Then, turn into the flying creature and fly to the top. You need to pull the lever, which will drop the wrecking ball on the next car. Then, jump down to the car you just dropped the ball on. Turn back into a troll and pick up the wrecking ball and throw it. This will knock a worker out of the car in front. Then, turn back into a goblin and run to the first car. Jump on it and turn back into a troll to damage the fuse box. The car will stop, causing a pile up and then you grab the head guy out of the car and he gives you back the orb.