Call out to them.

"Hey!" You call out to the figures after opening the window some more, "What's going on out there?"

Your receive no proper response, just more yelling and incomprehensible shouts. You decide to try again.

"Hey, is everything alright?!" You inquire a bit louder this time. This seemed to be the appropriate volume to grab someone's attention.

"H-Help me!" You hear from the pair of silhouettes. You can only assume that it was the one on the ground, with the other one pinning them down.

"Babe, what is going on out there?" Christine asks, worried.