It would have been helpful to us newbies if the screencast had been on for these tutorials, because I've spent a lot of time trying to figure out what keys are being pressed because he moves so quickly. When he goes to scale the bones at 1:35 I believe he mistakenly says press Ctrl-Shift-S which is the Save File As shortcut on my system (v2.80 final). I finally realized the shortcut to scale armature bones is actually Ctrl-Alt-S or via menu under Armature -> Transform -> Scale BBone