Two cars in a lake

I could understand if it was a curved roadway adjacent to the lake but this was the end of a roadway leading to a boat ramp.

How did these two cars end up in a lake 12 feet from the end of boat ramp? I didn't see answers to the question. I'm perplexed.

I could see the younger driver wanting to race but the older underpowered car with the 69 year old driver wouldn't make sense.

I doubt they were playing chicken where the winner releases the gas pedal last.

Maybe it was two separate accidents? Foggy conditions?

http://news.yahoo.com/submerged-cars-found-okla-may-solve-cold-cases-180312173.html

They disappeared about a decade apart from each other