As far as their current activities, Spike was more than used to catching on without the need for explanation. He made his way over without getting shot, and his conscience didn't immediately flare up at the idea of using someone's body as a means of dropping in on whoever was underneath. (There were easier ways of doing that, but he was still the outsider here. Easier to go with the flow when options were limited.) At least, he had a feeling they weren't about to drag them off to get medical attention.

Shouldering the newly acquired weapon, he used his free arm to grab a hold of the other side. Then it was just a matter of aiming.