Fans sometimes ask their celebrity idols for weird things — but have you ever asked one of your favorite stars to bite you?

That's what happened to Sterling K. Brown at a Supernatural convention. Brown played vampire-hunter-turned-vampire Gordon Walker in the CW series' first season so, naturally, a fan begged him to bite her when he attended one of the show's many fan conventions. The best part? He felt bad she had traveled so far so he did it — hard enough to leave teeth marks — and she loved it!

Brown recently told TVGuide.com the outrageous story (watch above!) with his This Is Us co-stars Mandy Moore and Milo Ventimiglia. The latter pair also had some crazy fan stories to share, coincidentally both involving tattoos.

Which fan story was your favorite?

This Is Us airs Tuesdays at 10/9c on NBC.