The time keeping in the Olympics need extreme accuracy when measuring the difference between the first place winner and the other athletes. Precision and accuracy are very important to make sure the times are correct.
The London Aquatic Center is one of the most technologically advanced pools. Pools can generate a lot of waves when lots of swimmers are in them making it more difficult for the athletes to go fast.
Robin is trying to teach the Titans about patience and why it is important. The Titans struggle with being patient and they fail each test Robin gives them.