Dropping a magnet through a hollow copper bar - GIF

[Ralphxyz]

But why am I seeing the magnet? That's what I could not remember.

[Harvey Melvin Richards]

But why am I seeing the magnet? That's what I could not remember.

You were probably wearing your X-ray vision specs that you bought off of the last page in your comic book.

[DIYSwede]

But why am I seeing the magnet? That's what I could not remember.

Such as: https://www.amazon.com/Magnetic-View.../dp/B00129CCGS