cruising along at 70 on the highway, a bit more noisy running than normal, and then a sudden SNAP - after which it ran quieter and smoother 
luckily, I was on my way down an off-ramp - at the stop light, steam came out of the hood vents
- radiator fluid all over

luckily, I was on my way down an off-ramp - at the stop light, steam came out of the hood vents