A young man and a senior citizen are sitting next to each other on a long international flight.

 The young man is thinking that old people are so dumb that he could get one over on them easily.

 So, the young man asks if the old man would like to play a fun game.

 The old man is tired and just wants to take a nap, so he politely declines and tries to catch a few winks.

 The young man persists, saying that the game is a lot of fun….

 “I ask you a question, and if you don’t know the answer, you pay me only $1….”

 “Then you ask me one, and if I don’t know the answer, I will pay you $1000,” he says.

 This catches the old man’s attention as he’s living on a pension now, and to keep the young man quiet, he agrees to play the game.

 The young man asks the first question.

 “What’s the distance from the Earth to the Moon?”

 The old man doesn’t say a word, but reaches into his pocket, pulls out a $1 bill, and hands it to the young lawyer.

 Now, it’s the old man’s turn.

 He asks the young man, “What goes up a hill with three legs, and comes down with four?”

 The young man stares off into the distance, and begins to contort his face in confusion.

 Frustrated, he uses his laptop to search all references he can find on the interwebs.

 He frantically sends E-mails to all the smart friends he knows; all to no avail.

 After over an hour of searching, he finally gives up.

 He wakes up the old man, and hands him $1000.

 The old man smiles, pockets the $1000, and goes right back to sleep.

 The young man is going nuts not knowing the answer.

 He wakes the old man up and asks, “Well, so what goes up a hill with three legs and comes down with four?”

 𝐓𝐡𝐞 𝐭𝐡𝐞 𝐨𝐥𝐝 𝐦𝐚𝐧 𝐪𝐮𝐢𝐞𝐭𝐥𝐲 𝐫𝐞𝐚𝐜𝐡𝐞𝐬 𝐢𝐧𝐭𝐨 𝐡𝐢𝐬 𝐩𝐨𝐜𝐤𝐞𝐭, 𝐡𝐚𝐧𝐝𝐬 𝐭𝐡𝐞 𝐥𝐚𝐰𝐲𝐞𝐫 $𝟏, an𝐝 𝐠𝐨𝐞𝐬 𝐛𝐚𝐜𝐤 𝐭𝐨 𝐬𝐥𝐞𝐞𝐩.