Eagle-eyed (or eagle-eared) viewers of the latest episode of 'Running Man' may have caught something interesting during the tail-end of the latest episode: a few bars of music featuring Kim Jong Kook's voice that viewers had never heard before!

Immediately, viewers started wondering if the music was a snippet of a track from his upcoming album release. Kim Jong Kook is scheduled to release his 7th full album in late October, his first since over two-and-a-half years ago.

Check out the scene below (starts at 1:29:45). What do you think?