Gunshot.....or not

Allow me to set the scene........
9:00 pm
a dark storm is rolling in
rain is starting to spit on the windshield of the van
lightning cracks through the night sky
a semi decides to pass me going up a hill
KER-POW!!!!!
that sounded just like a gunshot in my ear!
Just as the semi was passing me his right tire blew and forced him off the road. Of course I stopped to just to make sure nothing was wrong with the van........and of course to change my britches! That scared the bejeebies outta me!