Timelapse: 3D Printed bust - busted

15 hour print of a person sitting holding a beer, with temporary supports to hold the arm and other overhangs, squished into 5 minutes.
... Print went great but failed right at the end, leaving the top of the head open.
If you watch the X axis rods, you can see them moving up and down as the extruder moves around the print ... The automatic bed levelling system - works pretty well, compensating for not having the bed quite level.
Electron Prusa I3 3D printer kit.