I found this cool little counter today that is counting down our supply of IPv4 addresses. When it reaches zero, planes will fall out of the sky, birds will spontaneously release their bowls, butterflies will sting people…Basically, anything to do with ‘flight’ will go wrong. The rest of us will be perfectly fine and probably just switch to IPv6, but the sky-creatures are dead! 
Hah, thanks for the update. Now I know exactly when to panic.