A terrifying knife

Gao Xiang showed a surprised expression on his face, and he couldn't figure out what was going on. Just as he was wondering, a human face suddenly appeared on the broad tree trunk, with its huge mouth opened and screaming in pain.
The tree shook violently, and two hanging branches lifted Gao Xiang up like hands and sent him into the giant mouth.
Gao Xiang had no time to react at all. His body struggled violently in the air and he shouted loudly, but there was no place to gain leverage, so...