I did it same way. First I flash with fiasco image (2nd time) without reboot (removed -R) and after message came in terminal that device flashed, I removed usb cable first and switched off my mobile. Though, I didn't removed battery but I think it didn't boot up. Then, immediately flashed with eMMC image and rebooted.

It flashed eMMC in 26 sec. (Quickly) as wiki says it takes few minutes to flash eMMC image.