[scientist@work (OP)]

That's a good question.
The other day I saw I fly walking on the ceiling, so I was wondering how they do this?
Send some help, pls.
It really breaks my mind how they can do it.

[Zer0]

Flies need sticky feet to walk on ceilings, but not so sticky that they get stuck upside down. So each foot comes with a pair of claws that help hoist the gooey foot off the wall. Flies use several different techniques to get unstuck: pushing, twisting, and peeling its footpads free.

P.S. - 👍