Staind frontman Aaron Lewis unleashed an onstage rant for the ages at a select number of concertgoers who were apparently "molesting" a teenage girl trying to crowd-surf at Rockfest in Kansas City on Saturday, May 31.

In the middle of a performance of the song 'Something To Remind You,' Lewis stopped the show to lambaste a number of "f---ing a--holes" in the crowd for getting too handsy with a young woman who was crowd-surfing.

Lewis exclaimed from the stage, "Listen up you f---ing a--holes, that girl over right there is like 15 f---ing years old and you pieces of s--t are molesting her while she's on the f---ing crowd. Your f---ing mothers should be ashamed of themselves, you pieces of s--t."

It doesn't end there. Lewis has a lot more to say to the crowd, including threatening a beat down on the culprits, but we'll let you watch the rest in the fan-filmed video above.