Had a proper buttock clenching moment the other day.
Just left home, pouring rain and cold tires. Long straight, about 50 mph, 100 yards between me and pick-up in front (ie plenty of stopping distance).
Cue truck stopping without indication to turn into driveway. I apply brakes as usual, and only gently. Both wheels lock, so I release both brakes. Unfortunately, I was now going sideways, so the rear snapped round fishtailing back to the left.
At this point, I try the rear brake again, and it instantly locks up. Try the front, that locks too. Release both brakes, back end still out to left. Going far too quick, and have hardly slowed. Re-aply rear, locks again.
So by now, I'm thinking "What's the least painful way to hit that truck?". I was absolutely convinced I was going to rear end it. Anyway, I manage to direct the bike up the right hand side of the truck. Now he indicates and starts turning right. Somehow, despite him turning in to me, I manage to miss him by inches (my arm brushed his wing mirror).
So, once my heart rate had slowed to below 160 bpm, I go back on myself and discover a diesel spill that has spread across 3/4 the width of the road, and runs for about 60 yards. Fortunately it was raining that hard it wasn't going to last long.
Suffice to say, I wasn't impressed, and it left me without any confidence in my tire grip for the rest of the journey! Still, all's well that ends well!