(DC 101) - Staind was performing at Rockfest in Kansas City on Saturday afternoon when front-man Aaron Lewis noticed something in the crowd.

It appeared that young, female crowd surfer was getting abused.  Lewis stopped the song they were performing, "Something To Remind You," and launched into a profanity-laced tirade against the abusers in the crowd.

The language is NSFW. 

Lewis ranted:

"Alright, listen up, you f****** a**holes. That f****** girl right there is, like, 15 f****** years old and you f****** pieces of s*** are molesting her while she's on the f****** crowd. Your f****** mothers should be ashamed of themselves, you pieces of s***. You should all be f****** beaten down by everyone around you for being f****** pieces of s***. If I f****** see that s*** again, I swear to God, I will point you out in the crowd and have everyone around you beat your f****** a**."

A fan at the festival captured the rant chock full of NSFW language on video. (WARNING: EXPLICIT LANGUAGE)

Photo Credit Getty Images