'Game of Thrones' Star Slams Steve-O's Frost Giant

10/17/2014 12:39 PM PDT

Sansa Stark has lots of pent up anger ... and the video of her taking it all out on Steve-O's nuts is pretty damn hard to watch.

Sophie Turner punted the "Jackass" star right between his field goal posts with extremely painful results during an event for a big new movie they're both in called "Barely Lethal."

The flick is about a teenage special ops agent who fakes her own death, then enrolls in high school.

If it's anything like this video, we're sold.