Today, my mind was blown.My grandfather walks out to check how much Petrol he has in his car. Walks back inside and goes "Robert, I should have enough petrol shouldn't I?" I joke around and say, "I dunno, you're the one who went and checked, not me!"Then he proceeds to say, "Well Sheldon from Big Bang Theory would know, so why don't you?"WHAT THE HELL?!?! I don't know what to be shocked at!The fact that my grandfather thinks I'm that smart or the fact that my 89yo grandfather knows what Big Bang Theory is, and can actually reference a character!!!!