The grenades that Tiberius throws beneath the jet bikes behind you do as he intended. The middle jet bike explodes, and the plasma blast is enough to send the other two tumbling, swirling with white hot fire. Their riders all take a scorching to their backs, pushing them off balance.
This gives Krateron an opening.
He may kill one of the World Eater veterans as they attempt to get back firmly on their feet, or he may take this opportunity to help Tiberius with Krejer right away.
He will not have time for both.
You can never be prepared for the unexpected