Time Travel Isn’t Perfect
Time travel isn't a foolproof science. In fact, it can be positively dangerous if done improperly. Some people have reported even losing their limbs...
Some People Have Even Died
While in the time travel program, the man said he made a friend who traveled to the year 6000 with him. But while they were attempting to travel home, there was a freak accident. His friend got stuck and was unable to travel back to his proper time...