WHAT'S UP?

This pic below appeared in The Star under Thumbnail section that won a
prize a day ago.

It shows a car sticking on a wall. Now the question is not why but rather
how?

I mean how did they manage to stick a car on the wall? That's all I wanna
know. I can't figure it out really, most probably is bcoz my top has got too
much grey and I guess photoshop was NOT involved here.

Anybody got any clue?