Yes, the possibility exist that you could be injured by flying in space. The astronaut has to be aware of many things when flying in space. For example, is the electronic equipment performing properly and accurately recording the needed data? Are the ventilation system working properly, is the necessary mixture of oxygen, nitrogen and hydrogen just to name a few getting to the astronauts? Flying a space ship, while exciting, can be a very dangerous assignment. Sometimes astronauts have to drive a vehicle on the Moon or walk in Space; they have to be aware of the effects that gravity (or there being no gravity) can have. Even in preparing to fly in Space, an astronaut must continuously prepare and pay close attention to what is required.