I was dabbling with various patterns on my Pyramid - both tracks holding two patterns which I was changing in real time to see how the patterns fitted together. Then all of a sudden:
FATAL ERROR
1
0
20002D8
33027F8
20000260
8099B43
8099C6A
21000200
My Pyramid worked normally again after a power cycling, but my (as yet unsaved) project was gone, and with that, my inspiration. 
Any similar experiences? I run PyraOS 3.2.