The arrows are intimidating, but their true power was their magical ability to transform things. For example, in this case they have transformed a high-wing airplane into a low-wing one.
Jokes aside, it was really fun being there. Never flew in full armor or got shot at with arrows but I heard that some decades ago a student flew over a prison and some dumbfuck guard shot a hole in the wing.
By the way, Here is their Instagram page. The exact plane is I-CCAB, also affectionately called the tractor.
There's a quote that escapes me, some British Empire thing about how can you beat people that would fight a plane (or whatever) with spears and bows, but I see this and I'm just like... Easily?