Heck, there's a lot of oil on the roads

Someone must have been driving around in an oil tanker spraying oil on the roads, because bugger me if they aren't half greasy. I've been seeing the shiny rainbow patches all over the place since it started raining earlier this week, and I've gone sideways more than once (but thankfully never down). There's nothing like braking hard and feeling the back wheel suddenly want to overtake the front wheel; then backing off, regaining control, braking again and having it start sliding out the other way.

Erk. Something I can do without at my age.

Thank goodness I did lots and lots of broggies when I was a kid and have retained the muscle memory required to stay upright in a skid.

None of this was helped by morons deciding that the sudden outbreak of wet roads would be a great time to start overtaking cyclists and then immediately turning left in front of them. I had two close calls in two days - I thought I was going to be impacting on a couple of rear quarter panels if the buggers didn't get around the corner a bit quicker. I wonder what the etiquette is in those scenarios if you do make contact. Should I smack their face repeatedly against their car bonnet, or just boot them in the nuts with my cleated shoes?