Continuity mistake: At the Derelicte show, Derek is getting his makeup put on. He has black eyeshadow all around his eyes and it kind of "stretches" down his face. When he comes out onto the runway, his eye makeup is different. (01:11:30 - 01:13:30)
Continuity mistake: When Hansel is rappelling down to the D.J. booth, he has gloves on. When he stands up, the gloves are gone. (01:14:35)
Continuity mistake: Before the explosion at the gas station, the sun changes between shots.
Answer: It was raining and it was that water from before just running down the semi-sloped road.