He jumped into his mouth with both feet first.
As the man said "If a tree falls in the forest that you can't hear is it more likely to hit you"
"Monkeys do as monkeys say"
"You can't see the forest before it leaves"
"Don't get a cart before you loan your horse"
"You can't make a silk's tail out of a hog's purse"
"He was as blind as a baseball bat"