I got this by driving off a cliff to the left in the territory unlocked around Pink Eyes stronghold. You only access this area after you have completed act 2 of the story. The location is marked on the map in the video. I wasn't able to do this until I had fully upgraded my boosters and I removed my front ramming grill and armour to reduce my weight.
Although you end up off the map the trophy unlocks as soon as you land safely as demonstrated in the video.