Bad religion 
Seriously? I saw them in concert when I was like 13 and it was AWESOME. It was my first experience in a mosh pit, and I:
- was kicked in the face
- was punched in various places
- had beer spilled on me
- had red slushie spilled on me
- got knocked onto the ground where I stayed in the fetal position
- was helped up by the cutest boy ever who was wearing a green Operation Ivy shirt
- crowdsurfed
That was probably the most fun I ever had at a concert.