"There were five rules of Twitchhiker:

? I can only accept offers of travel and accommodation from people on Twitter.

? I can’t make any travel plans further than three days in advance.

? I can only spend money on food, drink and anything that might fit in my suitcase.

? If there is more than one offer, I choose which I take. If there is only one, have to take it within 48 hours.

? If I am unable to find a way to move on from a location within 4 hours, the challenge is over and I go home."