After having a horrible first day of university, you were sitting down on a chair, arranging to get picked up, when you're dorm mate barges in like he owns the place

"You're theory is plausible!"

He spoke with a confident expression

"And I'll not sleep until we prove it accurate!"

He declared confidently. It was quite the first impression. Normally, people part a conversation with "Hi" "Hey" "How are you?" "What's your name?" And other simple stuff, not barging into a room and declaring that they would be getting no sleep until they proved some theory was plausible!