When I was a kid I lived on the SE side of Okc. There was a motorcycle shop near SE 29th. I grabbed a piece of foam that was used for shipping motorcycles that was near the dumpster. It was about 4’x12’ and about 18” thick. After a rain, Lightning Creek would fill up with water and I’d ride my “raft” from near my house all the way to the park just south of 29th street.