Falling down

Be aware, be very aware, that if you're walking along texting with one hand and your ankle wobbles underneath you (like they sometimes do), that the act of concentrating on texting with one hand removes the ability to balance and you will tumble down head first into the street throwing your rucksack into the air, ending up facing the direction you fell in, dazed and confused, with the skin taken from your knee and gravel grazes in its place. I have first hand experience. Ouch.