From the DRRRx2 Event!!! Honestly, Mamo's acting skills are just too amazing and the way he speaks and pauses is hilarious (but awesome at the same time) xD And of course, props to Shimono for improvising the whole song on the spot and to everyone else (especially Kishio san) for the beautiful background singing
Video Source: http://www.bilibili.com/video/av4176006/