Do you guys remember that glorious swing set glitch in GTA IV? The one that would launch you (and vehicles) sky high? Well it can be done in GTA V too. Kind of. Maybe. It's pretty much the same. Just watch.
The guys at Achievement Hunter found a nice little spot that will launch you into the air provided you can get the setup right. It just might not work on all vehicles.
For comparison, here's that beautiful, beautiful swing set from GTA IV: