What Happens If You Use Multiple Coiled Extension Cords?

What happens if you use multiple extension cords? Or if don't unwind them before use? Will there be any reactive current? Is it safe to use them like that? We try to find out :D Don't try this at home or try to recreate our experiments at home!

For more electric stuff go watch
ElectroBOOM https://www.youtube.com/user/msadaghd
or bit less informational but more dangerous stuff Photonicinduction
https://www.youtube.com/user/Photonvids

Видео What Happens If You Use Multiple Coiled Extension Cords? канала Beyond the press