STONES.

It is a bit different with the stones, because they may 'hurt' the canoe, too, and it is really a bit boring to paddle if you have a hole in your canoe. When you bump on a stone, it feels more or less the same as when bumping into the riverbank or a tree - you'll fall from your seats to the canoe or into the water and get hurt or wet or both. The faster you were paddling the more you'll be hurt - in fact you won't if you paddle slowly and reasonably, because you can spot the stones and DO something. Slow down, for example. Unfortunately canoers very rarely remember that it's possible to brake the canoe, or even stop it.

Or you are not able to agree between the two of you which side of to pass the stone - this or that (never use 'right' or 'left' on the river. That's land-terminology, as 95% of the canoers immediately forget which is which) and go stright ON the stone, sideways. Spinning like a compass-needle. The canoe may get loose with a jerk and you make some senseless movement and get swamped. And if it really happens to be your black day, the water will pull the canoe to the bottom of the river and it will act as a dam and we have to go and find a tractor, because man's power and the power of water … Yes, you know.

RAIN.

It's amazing how few people seem to be aware of the widely-known fact that rain makes us wet. And, consequently, being wet for hours you'll inevitably face the moment when you can't ignore the cold by mere willpower any more. Being wet, though, has its good sides as well - you don't have to worry about getting swamped any more (as it is not possible to get any wetter anyway). If you are planning the first canoe trip of your life, it's not wise maybe to buy the special waterproof clothing, as a big (about 150-200l) plastic bag will do fine. Just cut the holes into it for your head and arms. You may even tape small plastic bags round your feet and legs, if you don't have the rubber boots and it's raining hopelessly. If it's your second trip, you'll know well what you need(the knees and shoulders get wet first) and you won't forget the woollen socks. Somehow the woollen socks manage to keep your feet warm even when they are wet, and that's quite important, as your legs are somewhat inactive (as far as paddling is concerned) and get stiff. In a secret and sly manner. And surprise you with their new disability at the end of the trip.

By the way, it is by no means compulsory not to move your legs or just change their position from time to time. You may even come to the riverbank and run a bit or do some knee bending (especially in cold weather, to 'activate' your blood again).