How Billie Eilish can walk on walls during Saturday Night Live

While it wouldn't take much for us to believe that Billie Eilish was capable of walking up walls and ceilings, she has a trick!

Well... the Saturday Night Live studios do.

The singer just had a very special performance on the show, where she successfully tripped everyone out.

WATCH: How Billie Eilish walked on walls and performing on Saturday Night Live was SUCH an awesome illusion

Thankfully, Justin Theroux posted a BTS video of the studio and the snazzy equipment they used to make Billie look like she was walking on walls while performing on LIVE television.

Saturday Night Live

Billie wasn't really climbing the walls. Instead, the walls were moving. The whole 'room' was.

It was lifted and attached to a machine that rotated clockwise as Billie performed. She walked around normally, but it looked like she was walking upside down.