craziest thing eva done!

I was driving a Suzuki Omni and it was raining heavily. There was an accident with a oil tanker and oil spilled on the road. With out seeing all these due to rains, I applied brake and reduced the gear only to make way for a big truck to pass. Not only the brakes did not work, the van went into a 10 ft deep ditch. I feel that is the craziest thing I have done. Luckily nothing happened to me.