Everything in Texas is big

A fellow walks into a Texas hotel dining room and orders a small glass beer.
When the waiter comes with the drink it was the size of a a keg.
The guy says that he just ordered a small glass of beer.
The waiter says, "That is a small glass of beer, son. Everything in Texas is big."

Then he ordered a small steak.
When the waitress brings it to him, it is this huge 40 oz. piece of meat.
The guy says that he only ordered a small steak.
The waitress says, "Son, everything is big in Texas.

After eating he asks where the bathroom is and is told to take the third door on the right.
By now he is a bit smashed after ALL that beer and though he carefully counts the doors, he enters the third door on the left and falls into the hotel swimming pool and sinks to the bottom.
As he surfaces, he lets out a terrified scream,........

Spoiler:

“For God’s sake don’t flush”