Vantablack is a forest of carbon nanotubes standing on end. Light gets lost inside, bouncing from tube to tube until it is absorbed: about 99.96% of visible light never comes back out. Applied to a three-dimensional object, it erases every contour, so you seem to be staring into a hole cut out of reality.
Cooled below −183 °C, oxygen turns into a pale blue liquid. Pour it between the poles of a strong magnet and, instead of flowing away, it hangs suspended between them. The reason lies in its unpaired electrons, which respond to the magnetic field. Liquid nitrogen, by contrast, is colourless and pours straight through.
In 2012, Felix Baumgartner jumped from a capsule hanging beneath a balloon, about 39 kilometres up. In that extremely thin air almost nothing slowed him down, and he reached around 1,358 km/h in free fall, or Mach 1.25. He became the first person to exceed the speed of sound with nothing but his own body.