Possible Clues:

• 'The years just zip by!'
• "Did we really stay up talking all night?!"
• Record speed of insects -- but life's so short
• Just see how fast the insects are
• It seems not to take long to try to see how fast the insects go
• Start to find invented story in this paper? How quickly things move on!
• It happens when you're having fun
• Proverb - so life seems short
• Just see how fast the insects go?
• Start of a quip