A4 back on the road

[Per Lindgren]

TM wrote:

>the spark plug in cylinder 1 had disintegrated, electrode shot into the
>cylinder, traveled from cylinder 1 to 2 to 3 to 4, found the electrode
>in
>cylinder 4.
>

How is that even possible? I try to think how it have travelled is that 
it must have gone out via the intake valves all the way through each of 
the cylinders, so in other words, it must have done this trcik 3 times. 
I dont get it!

PerL
87 Cq