How long can a human being survive

How long can a human being survive

A teacher asks her class: “How long can a human being survive without sleeping?”

Mary on the first row responds: “24h”.

Peter on the second row responds: “48h”.

Then the teacher sees John, daydreaming as usual, and asks him:

“What do you think John?”

John goes, “I think… 3 weeks minus 15 minutes.”

“Come on John”, the teacher says, “Why it doesn’t surprise me that you are the one giving me this ridiculous answer.”

“Listen Miss Boomer”, John replies,

“Say what you want but yesterday evening I heard my dad say to my mom: today, we’re going to bed 15 min earlier because it has been 3 weeks.”