Unfortunate yet hilarious times were had for 'Running Man' cast member Lee Kwang Soo and guest Go Chang Suk when they were given a mission to sing karaoke while riding a roller coaster!

As part of their Busan outing, the Purple Team was assigned the task of scoring over 90 points while singing a song of their choice.

Unfortunately (or fortunately for viewers), the team ended up doing more screaming than singing, and in the end, failed to pass the required 90-point mark for success.

Check out their wild ride below, starting at 18:30!



Source: TV Daily via Nate