We're glad Mark knows why his dad is now MIA. But, since it's a little hard to understand if you don't speak Mark:
Cathi: Mark, where's Dad today?
Mark: At the Hospital.
Cathi: At the hospital. What's he doing at the hospital?
Mark: (no idea what he said)
Cathi: Is he learning how to be a doctor?
Mark: Doctor.
Cathi: And what does the doctor say?
Mark: No more monkeys jumping on the bed!