I remeber seeing this movie maybe late 90s early 2000s. It was very late at night/ early morning.

I don’t remeber a lot, but there was a group of people who end up in a warehouse or building and I think everyone is naked.  For some reason people explode. There’s a scene where a young guy and girl are about to hook up and he pulls a mattress off a shelf or something. It was a while ago and I don’t remeber a lot but it’s been bugging me really bad. Thanks!