You will have the chance to do this right at the beginning of Stage 6, Killbilly. You will need to create paths across the hole by stacking up cars. Killbilly will be throwing them at you from the other side. Just line up with the car that he throws and press ( Y ). Y is used for all of the cars so it shouldn't be that difficult.
The achievement will unlock after the building almost crashes on top of you.
Credit to PowerPyx for the video