"Ere, Simon, how do you know you can die?"
"I said, how do you know you'll die? Or that you even can?"
"What are you on about now?"
"I was just thinking. You could have superpowers or something, so how do you know you even can die unless you try it?"
"Don't be stupid, everyone can die. It's a given."
"Yeah man, that's what they want you to think."
"Oh don't start with all your conspiracy theory rubbish. It's too early in the day for that."
"It's not a conspiracy theory. What if it turned out you'd gotten superpowers during the night and you were now invincible - how would you even know?"
"So come at it another way - we all reckon we can die because people keep doing it, but how do you know you actually will?"
"It's the natural law."
"But how do you know?"
"I don't, but I'm certainly not going to try it to check either way."
"You've got no vision, have you?"
"Well you do it then."
"Fine. I will."
"No! Don't! Don't jump out the-"
"It's okay, I'm alright! I told you I couldn't die!"
"Oh don't be stupid. I just looked out - you landed in a dumpster!"