The magic lamp

John finds a lamp, rubs it and out comes a genie.

The genie says he will grant John three wishes with one condition: everything he wishes for, his wife will get double. So John says thats fine.

First John wishes for a million pounds, so his wife got 2 million. Then John wished for a ferari and his wife gets 2.

Pausing for a moment, John says "Why dont you scare me half to death?"