OMFG i don't know what to do!!!?

ok so like my friend (nikki) is at my other friend's (jess) out rite now with her younger brother. nikki called me and my other friend (mikael) complaining that jess has really gone crazy and that it's not a joke! Jess was yelling at the top of her lungs. She kept saying stuff. Mikael thinks it has something to do with the movie, prom nite that they saw yesterday. Then jess took a KNIFE and was running around with it. She stabbed nikki in the toe, but it was a little cut. Me and mikael have no idea if they are just kidding or if that THIS IS REAL. It's all happening RIGHT NOW and i need ur opinon. Nikki won't let us call the cops or jess's mom. Nikki and jess's brother locked themselves in the rest room.