One of those skits rarely done yet quite funny if done right.
Cast: Grandma, Grandpa
Setting: Train Station

Grandma: (In old voice) Grandpa, is a train passing from the south today?

Grandpa: (Hobbles over to station, checks the schedule, looks to the south, returns, and in an old voice,) No, Grandma.

Grandma: Grandpa, is a train passing from the north today?

Grandpa: (Hobbles over to station, checks the schedule, looks to the north, returns.) No, Grandma.

Grandma: Grandpa, is a train passing from the east today?

Grandpa: (Hobbles over to station, checks the schedule, looks to the east, returns.) No, Grandma.

Grandma: Grandpa, is a train passing from the west today?

Grandpa: (Hobbles over to station, checks the schedule, looks to the west, returns.) No, Grandma.

Grandma: Good. We can cross the tracks now.