在勇气训练营中，学员们需要赤脚走过燃烧的木炭来完成火步行走挑战。

During the courage training camp, participants had to ___firewalk across burning coals as a challenge.

他在没有充分准备的情况下接手这个项目，简直就像在火上行走。

Taking over this project without proper preparation is like ___firewalking for him.