GLASGOW, SCOTLAND - MAY 24: Niall Tomlinson of One Direction performs live at Radio 1's Big Weekend at Glasgow Green on May 2
Dave J Hogan/Getty Images

One Direction fans aren't exactly known for their restraint, but the boy band's recent show in Amsterdam got a little out of hand when Niall Horan—who recently underwent knee surgery—was whacked in his knee by an object thrown on stage.

"Can you limit what gets thrown on stage please! Coz somethin thrown at me tonight! Hit my knee! A lot of pain from it!" Niall tweeted. "Never wana sound like I'm complaining! But only having my operation 5 months ago, I still get a bit of pain and I'm very scared about it."

Horan wasn't the only victim that night. Another fan nailed Harry Styles in the face with a random object.

Can we please agree that moving forward, Directioners should limit themselves to pelting 1D with fluffy marshmallows during shows?