How long would this have taken to blow up?

This Bunny is (maybe was, now) in the foyer of the National Gallery of Victoria. Please note the preturbed security guard. He had to stand there to make sure that no-one touched the Giant Bunny. My sister, Michelle (also pictured with Giant Bunny) was warned not touch the Giant Bunny. She replied that she simply wanted to have her photo taken. The security guard seemed okay with that.
Michelle and I speculated as to how much crap the 'Giant Bunny Duty' security guard might get from the other guards. Did he draw the short straw? Was he the new kid? Was he the last to get to work? Did he mention to his boss that he wanted to take on more responsibility?
I also wondered what happened if someone persisted in touching the Giant Bunny. Can someone be arrested for such a thing? Would there be a tussle? What happens if the Giant Bunny gets caught in some kind of cross-fire? Surely, your general lilo repair kit wouldn't fix it...