On a cold, windy October day, one wouldn’t exactly expect to see a group of shirtless atheist and agnostic students by the Willard Building, begging you to pelt them with water balloons. But in order to raise money for the Penn State Atheist and Agnostic Association, this is exactly what a brave, and rather cold, group from the organization decided to do.

As part of the Stone an Atheist fundraiser, participants “stoned” group members with water balloons for $0.75 to $1. The group’s members hope to use that money to pay for high-profile atheists to speak at events for the group, like Dave Silverman, the president of the American Atheists. Furthermore, the group just wanted to let people know it exists.

“More often than not, people just come up and talk to us and never buy balloons,” said President Max Hummel.

There’s a more serious aspect to the fundraiser, too. The group wanted to give attention to the fact that in many countries, stoning atheists is still an accepted punishment for the belief.

So next time you see a bunch of shirtless students begging for you to pummel them with balloons in the cold, be assured they’re not crazy.