It all started with their annual Sober October Challenge when Bert suggested a Hip Hop Dance Competition and the majority of the others declining the idea.  

Bert took it upon himself to go out on his own and make a dance video for himself. 

https://www.youtube.com/watch?v=JB76Kb768v4  

After a bit a time, with no notice of hype, Tom Segura drops a BOMB and claps back at Bert.  

https://www.youtube.com/watch?v=lDNfKSp_4SI 

The only thing better than Tom's video, is Bert's reacation to the video where he watches it for the first time live on their podcast Two Bears One Cave. 

https://youtu.be/vUO4dmDPvFo?t=11