Forum:Jumping the wall at Lockdown Palace

So I found something strange with getting into Lockdown Palace. The mission implies that I am to use the house roof as a ramp to jump the wall, and Moxxi's ECHO after having entered the area confirms this. However, I am not able to clear the wall, not even close. I am using a Runner, or whatever the fastest car in DLC3 is called. I am backing up as far as I can, and using the boost at various different places. One discrepancy seems to be that the boost deactivates after a second or two of air time, but I'm not sure if that always happens. What I end up doing is hitting the wall about 5 feet below the top, and landing on the cliff. I can walk(but not drive) to the right and directly into the courtyard. Now, here's the kicker: I joined a friend who was around that point, ended up being the driver, and when we got to that point I warned him that we wouldn't make it over the wall, and that was ok. On the first try, we go soaring over the wall, clearing it by about 10 feet. And just to make it even clearer, I was going to the palace in single player again after that for the prisoner mop-up and hit the wall square in the middle. Is there some sort of speed boost cars get in multiplayer?