Hired as an ambulance siren, Heathcliff was embarrased to learh he had climbed onto the wrong vehicle.
Heathcliff is seated on a poorly drawn ice cream truck with no steering wheel. With his mouth open, he is shedding numerous droplets of milk for reasons unknown.
The owner of the ice cream truck is ignoring the cat's strange behavior. He is trying to return a cup of coffee to a coffee shop employee, saying "It's even worse during lunch break." Apparently he's telling the coffee shop worker to start making fresh coffee for the lunch time.