Part of the machine was a PVC reindeer that squirts water out of its antlers. When greater water pressure is applied, the streams will set off the next part of the machine.
A fiery wick sets off at the start of the machine.
It burns more rapidly as it reaches the end.
At the end, a candle burns through a string.
And so on...
An air cannon awaits at the end of the machine, prepared to blow a sandwich to oblivion.
A set of heating ducts falls like dominoes.
Finally, the sandwich is blown to bits.