Without a doubt, the trio was trapped in an impasse; a deadly situation.
Very likely, their opponents had anticipated that others would pass through here, and had stationed themselves here for a period of time already. The clear proof of other battles between them and dinosaurs, or them and other contestants, was the throwing knife that Mogensha discovered.
Therefore, this was a flawlessly planned ambush.
Recognizing that, Mogensha and Sheyan immediately jumped aside, each to the left and right, without a sound. It appeared as though a terrifying aviation bomb had landed between them, and they were blasted aside by immense detonation force.