何事

To be stubbornly upset. Also means to purposely spite what one disapproves of. To be cross at something with someone. "Immediate reaction to the tedious―"

Source: http://dictionary.goo.ne.jp/jn/198995/meaning/m0u/

In short stories and such, it is a stunt that causes the audience to laugh when it shows up onstage. It has roughly the same payoff as "the punchline (the last bit that gets the biggest laugh)" in its timing.

Source: http://dictionary.goo.ne.jp/jn/254633/meaning/m0u/

Can Starbow Really Be Seen?

In SF novels and movies -- according to the presentation that makes it visible, the star is blue when its motion is approaching the speed of light, while the light behind it becomes red.

Though the theory is comprehensible, it's a question of being able to really see Starbow.

Both infrared rays and ultraviolet rays--which are invisible in a state of rest--become captured in a state of motion. The star's resulting color, as ...