Tar snakes don't usually bother me much. You do slip a bit on them, but when you slip, you usually slip off them and then regain traction. UT-12 from Torrey to Bryce Canyon (one of the great roads in the west, BTW) has a bunch of them as you go over the mountain south of Boulder (can't remember the name of the mountain right now -- it may be Boulder Mtn). When you hit those tar snakes, you just slip sideways a few inches and you're good to keep going.
I'd rather be a 

mess is one of the biggest advantages to being retired...:smile: