It would, to use some scientific terminology, "go boom."
People would probably make their inner thoughts reality like robbing the bank or something like that
Everybody would wet em.
The ghost of Dick Clark would begin the apocalyptic countdown.
I will kiss my crush/es
Maybe love for thy neighbour would break out and the world would see what it could've been like the whole time,,,,,,,,,,,,, too late xxx edit probably go looting for toilet roll though knowing humanity a ha xxx
Get the last rocket to mars
Then the people from earth will give humanity to the comet and will do parth with it.
I think a lot of the decent people that are left in this World, with its dreadful state of affairs these days will just say, "Thank goodness. " :).