Most people really take for granted that their meal is going to obey the normal laws of space and time. Then, when something like this occurs, it's quite a shock.

It's actually easy to explain.

Gravity pulls things down so you can't have things stacked on top of each other like this unless gravity is flipped.

Yes

Can’t unsee.

I think it's a matter of shade and lighting that lets us detect that they are in fact upside down.

Actually the peas are the right way up and everything else is upside down