XSp.

This is what happens to paperclips if you put them on the floor of a moving japanese train:

It’s due to electromagnetism generated when the train accelerates or brakes.
And no, they won’t ask you if you need help writing a letter or something (oldschool reference). 😛

Because you know, it won’t quite dance like this:

Clippy, for those not old enough to know it, was an Microsoft Office annoying assistant that would pop up almost every second while you were trying to write something…

Source: Gizmodo