Well, Shinhwa did it again - not the "winning #1" part (which they did), but the "keeping promises" part. 

Remember when Eric promised to give Shinhwa Company employees a bonus if they won 'M! Countdown', and then kept the promise? Well, they also promised to do a part of "The Solver" choreography if they won on 'Music Bank'. After they won, a few of the members did a little bit of it on the encore stage, but just in case you didn't see it, the boys went backstage to upload a video for the fans.

The members confessed, "We made that promise because we honestly thought we weren't going to win." But the members of Shinhwa always keep their word, and they performed one part of their debut choreography for their fans (without music, but still)!

Also, Shinhwa Company gave a word of warning to those of you wearing earphones while watching: turn down your volume. The boys get over-excited near the end and start shouting really loudly!