Haha I love it with just the dog innocently walking around. All the other set up stuff seemed unnecessary, if I just saw some of that I'd be scared without the spider.
I'd have been fine with people seeing him run around with the suit on. The elevator zombie'ish thing seemed like overkill. In broad daylight, I'd run like hell from that at first glance.
I think this was one of the better ones, but I don't understand why these pranks don't fail more often. Like what if someone shot the dog or otherwise injured it? How funny would it be then?
I think that did happen on one. I'll try to find it but basically they caused a car to crash, then ran off and didn't do anything about it. People were raging about them on reddit.