Continuation
At the edge of the cliff, two trees mark the spot where you must stop, since any continuation requires a way across. The trees seem long enough to reach to the other side, but how are you going to chop them down?
れき
へ
None
Continuation is impossible unless you chop these trees down to make a bridge to the other side. You decide to use a wrecking (れき) ball. Luckily, there's one right by you. So you take the wrecking ball and knock the trees over, making a bridge with them.