That's a pretty clever re-purposing of the old lower propane fridge vent. Classic photo of you going into the garage, talk about close!
I had a friend back in the day who made a delivery to an underground loading dock in his work truck. It was close but no issue. However on the way out he was lighter (having dropped the load) and... CRUNCH! on one of the roof beams Luckily it was "just" the dome for a roof vent and not the actual truck roof that was broken.
Luckily it was "just" the dome for a roof vent and not the actual truck roof that was broken.