A video recently posted on NASA's YouTube channel proves that even (or maybe especially) astronauts get really excited about space stuff.
During an expedition in summer, astronauts "built" a water bubble the size of a softball to explore the phenomenon of surface tension in microgravity.
The astronauts then put a GoPro camera inside the bubble and recorded the results. All the while they were super giddy about the whole thing. Check out the video above, and if you have some 3-D glasses laying around, you can watch the same video in 3-D, here.