An individual Charging at another and then, when the elephant gets close to the object of its Charge, apparently, purposefully "tripping" and falling down engaging in either Kneel-Down or Tusk-Ground. May be associated with Trumpeting.
References: Poole & Granli 2021. (Full reference list)
This behavioral constellation includes the following behaviors: Head-Waggling, Kneel-Down, Run-After, Tail-Raising, Tusk-Ground and occurs in the following context(s): Social Play