He kept his calm and reasoning since he realized that he couldn't just break through with brute strength. The time it took to destroy the barrier using his Decaying powers also gave him the time to think about other things.
"Decaying doesn't work on it. Lightning will be useless. Wind can't help me here either. The healing is also of no use here. That only leaves my strength."
He stopped using his Decaying Power and placed all his focus on brute strength. He held two bars and started trying to bend them apart to make way for him to leave; however, he found it challenging. Even with all his strength, he wasn't able to move them even an inch.
...
The carriage, in which Lucifer was trapped, was hanging to the helicopter in the middle through a wire rope.
The Delta Squad believed that there were only two people inside that helicopter. They thought that Cui and the pilot were the only two inside, not knowing how wrong they were.
