sparks on my plug boots?

The Penguin

triple secret probation
I was riding this evening - and it was getting dark as I was flushing the ski.

I was looking down at the plug boots and there are sparks dancing all over the place :bigeyes:

is this normal?

I have NGK boots on the plugs.

Now, everything was still wet from the rinse-down - could that have something to do with it?
 
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