WebOS Doctor begins
At 3%, a ramdisk is transferred to the phone, and the phone is rebooted
At 4%, the screen changes to the palm logo
At 9%, the screen changes to a big arrow pointing down to an integrated circuit
Novaterm access is available from 12% onwards
The progress bar advances by 2% increments every 20 seconds or so
If it gets stuck at 52% for more than 30 seconds, it's not going to progress further and you will need to try again.
Around 54% the filesystems are being partitioned
Around 64% the modem firmware is being reflashed
Around 72% the carrier apps are being installed
Around 82% the ROM is being verified
If the process fails at 84% or later, the flash and modem have actually been written, so if you reboot you will get what you were flashing.