A Funny Joke About Monster Truck

Here's another funny joke about Monster Truck:
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A guy comes to visit his friend which he hasn’t seen in years. Friend’s little son opens the door.

“Hi. Could you get your dad?”
“No. He was hit by monster truck.”
“Oh! How unfortunate. Could I talk to your mum?”
“No. She was hit by the monster truck!”
“I’m so sorry… Could I then talk to your granddad?”
“No. Hit by the monster truck too..”
“Grandma?”
“Too…”
“What a tragedy. And what are you doing here, alone?”
“Playing with my monster truck. Wanna join….?”