GRAVEL. For example, you go to visit people who live outside the city. Turning to the side of the house, you see that the asphalt is overcome on the street, and the working area is just filled with gravel. As soon as the wheels fall on it, the front suspension leads from side to side, you squeeze the clutch, and intuitively remove your legs from the steps. With the help of the steering wheel, you try to restore balance. But under gravel, the hidden bumps and fossa are hidden, and falling on the protruding part, the bike begins to fall on the side. An attempt to keep him with his feet falls. As a result, your two -wheeled friend is scratched, self -confidence is reduced.