I was bored and discussed a problem with my classmates today. Is the probability of being hit by bird droppings related to the speed of cycling? Please analyze it in detail. Don't answer "yes" or "no"

Suppose a nine-square grid, the probability of bird droppings on the top of each grid is the same, which is 1/9. It is only possible for bird droppings to hit the ground from the top of the head, and it takes time for bird droppings to fall freely at this distance. If the man rides his bike fast enough to walk through the nine squares in this time, he must be shot. . . But if he is faster, he will turn in one of the squares, so the probability of his being hit has nothing to do with speed. . . . To sum up, it is found that there are only two simple examples in front of the conditional answer according to the different scores of this question.