Relativity Limerick

There was a young lady named Bright,
Whose speed was far faster than light;
She set out one day
In a relative way,
And returned on the previous night.

To her friends said the Bright one in chatter,
"I have learned something new about matter:
My speed was so great,
Much increased was my weight,
Yet I failed to become any fatter!”

— Arthur Henry Reginald Buller