Momentum is building for the NFL’s next on-field rule change.

The league’s competition committee, as well as its health and safety committee, are discussing how to respond to a tackling technique that their data says “results in about a 25 times rate of injury as a typical tackle,” executive vice president Jeff Miller said.

The league calls the tackle in question a “hip-drop tackle.” If that doesn’t clarify the play to you, you’re not alone. The league is trying to better define what does and doesn’t constitute it.

“It is an unforgiving behavior, and one that we need to try to define and get out of the game,” Miller said.