Ok, this reminded me of something from back when endgame was in theaters.
First a bit of context:
My dad would always come up with fake spoilers for various movies before my sister could watch them, and he had been doing it for so long that she just took everything he said as bullsh*t.
But then endgame comes around, and he decided to tell her about fat thor
Of course, she thought it was a lie, but then he took her to see endgame
I WISH I was there to see the look on her face when fat thor showed up. Dad said it was amazing