What the heck happened here??

Turned on my rig (minus props) P3A so that I could go through the menus and check the settings.
The only thing I changed was the brake settings, dropped it from 100 to 80 just to smooth it out a bit.
]Suddenly everything seemed to go mad, the LED’s on the drone flashed all over the place and different colours and the display suddenly displayed the “update” message attached. As most on here know I’ve just done an update, not to the latest but to 1.4.10.
I turned off the drone but the battery "red LED on the ON/OFF switch stayed on. Pressed it twice and the battery turned on.
Turned off everything and back on and everything seems to be all right.
Bit scary…