from
Jargon File (4.4.4, 14 Aug 2003)
fireworks mode
n.
1. The mode a machine is sometimes said to be in when it is performing
a {crash and burn} operation.
2. There is (or was) a more specific meaning of this term in the Amiga
community. The word fireworks described the effects of a particularly
serious crash which prevented the video pointer(s) from getting reset
at the start of the vertical blank. This caused the DAC to scroll
through the entire contents of CHIP (video or video+CPU) memory. Since
each bit plane would scroll separately this was quite a spectacular
effect.