"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."