"They will have to take it away from him with his heels dug in."

His heels dug deep into the dirt with his effort.

He looked at the black scars on the rock where her heels had dug a moment before.

Her heels dug into the bed behind his hips.

His heels dig in with the force of his and her weight.

His knees came up and his heels dug into the ground.

Her heels dug into the mattress, driving his finger deeper.

She winced as her heel dug into the rocks at a sharp angle.

I hit ground knees bent, heels dug in, with bullets kicking dust all around me.

My heels dug into the wooden base of the booth, giving me launching power.