Tony Hale is a devout Christian and is a complete retard when it comes to swearing. The script called for him to swear for about 30 seconds and he just couldn't do it.
“As to the effect of the wave on the air, we will suppose the water to be quite flat and the air motionless, a heavy undulation comes on the scene, it has to pass, so it pushes the air up with its face, letting it fall again as its back glides onwards.”