Mechanical wave Puns

Its an essay over the movie Cast Away and its about how the eggtimer, from the beggining of the movie, represents mechanical time(clocks) and how the waves on the island represent biological time(the human life cycle). Give me the best you've got!

Edit: I have untill tuesday (10/13/13)

Now, I am not a dad, but I told my father this joke and he giggled, so I feel like it still counts as a dad joke. In a unit on wave mechanics, my class was discussing pendulums. As we talked about pendulums and how they related to wave mechanics, my buddy said, in a contemplative manner, "I just don't know what to think about pendulums." I responded, "So you could say, your thoughts have gone back and forth on the matter." Many groans were had.