Go for a tackle

You decide to try to use your heavier body to tackle her to the ground. You suddenly charge at her as fast as you can, but, before you can make contact with her, she steps to the side and dodges your tackle. You realize this but aren't able to stop in time, crashing face first into the wall behind her.

She takes advantage of your dazed state and sweeps you off your feet, sending you falling to the ground as she watches with a smirk.

After a moment, you start getting up and that is when she pounces on you, knocking you back down to the ground.