I believe it was somewhere mid-80’s to mid 90’s but not 100% sure. I do know I saw it in the 90’s as a kid. The scene I remember is a girl is sitting on a guy’s lap at some concert or party. They’re making out and she leans back. He sort of dips her and while she is upside down she sees the alien on the ground. I’m not sure if the alien kills her or what but when the guys pulls her back up she seems passed out so he just lets her drop to the ground and walks off to party elsewhere. I also believe there was a scene where a homeless man sleeping in the sewer was attacked by the alien but I could be mixing movies. Any ideas are appreciated. Thanks!