who was first?

A bricklayer, a carpenter and an electrician argued about who was on earth first.

"We built the Pyramids of Giza," said the bricklayer, "so we must have been first."

"No," said the carpenter, shaking his head.

"We built Noah's Ark long before that."

The electrician chuckled himself.

"What's so funny?" asked the carpenter.

"On the first day of creation, God said, Let there be light," explained the electrician. "And we'd already laid the cables."