Deryck gets piano sounds and Cone goes home to Toronto. I believe Deryck is playing "Ballad of a Thin Man" by Bob Dylan to test out the piano sound.
I know Sum 41 calls this "Update #7" but it should be #8 if you start counting from the update titled, "Day 1 Again!" which is technically a studio update as well.
Cone working on the last song on bass. Six or seven songs are going to have different sounding bass parts put into them. The riff from a Sum 41 studio update in 2009 also makes an appearance.