Made me think of a road trip where we overnighted in Edmonton. Driving an Acadia with a roof box. Of course family want to visit West Edmonton Mall, traffic is heavy I see a gap to cross the road, tear up the ramp and about 5 feet short of the height warning barrier all I see is people staring with mouths open, I'm easily to 50kph at this point. And it suddenly dawns on me the roof box!!!!!!!
No bang thud or other noises, I carry on and park up. On the way out I deliberately stopped by the barrier, and I swear there was about an 1/8th of an inch clearance.