um...

you know when you get a wee tickel somewhere... maybe on your neck or your arm... while your working on something - focused somewhere else... and you absently reach over to that spot to give it a little scratch? you know? just a little tickel?

And when your fingers get there...
you touch something that fucking moves!
Oh geezus! Just a wee tiny bug... but crap!
Scares the beegeebers out of you.