HELP!!

I have an Accord with the VTEC engine with 81,000 miles. Today I was driving and the oil light started flashing. I stopped and looked under the car and a HUGE puddle of oil was forming from the front of the engine. I immediately shut it down and called a tow.

Can someone help with what might have happened? There has never been any oil leaks and there was no oil on the floor of the garage before I left.