NASA astronauts might seem like atomic supermen, but they are still only human, with the same foibles and fears that the rest of us have. Just because they aren't screaming like little girls as the craft makes its re-entry doesn't mean they aren't screaming on the inside.
The best proof of this is NASA's protocol for space missions. In between the list of pre-launch requirements lies a longer list
You might think that in zero gravity a yo-yo would be a totally worthless toy. Thanks to astronaut Don Pettit, currently orbiting Earth in the Internatinal Space Station, we get to see why it's actually a hundred times more fun.