Eventually if you use gravity magic long enough, you'll be able to poke whoever you're feuding with and they'll fall over. Excellent for alibis.

*out in the open at a mall or a restuarant*

"Mr. Villain sir, I've been casting demi3 at you under the table for about an hour now. Will you agree to my terms or not?"
"Mrs. Heroine, I find I cannot do that. I still don't see why I should."
[fake shouting] "Oh Villain, I love you!" *reaches over as though to kiss or hug* "OMGOMGOMGOMG HE'S DEAD!!!! WAITER, WAITER!"