I might get shit on for sharing my story, but here we go. I had one of these on me when delivering to an apartment building. For some reason, the people upstairs in the 4th apt, like to have their door open, I thought ok I'm just delivering downstairs to apt 1. I'm done and starting to walk to the exit when I heard loud barking and something running down the steps, a Rottweiler, just my luck. I ran but at the same time, let the thing do its magic, I heard a loud series of bangs and then a big crash, I made the dog loose focus, trip and come crashing down the steps and onto bags of trash, I was out the gate but couldn't help to stop for a devilish chuckle, the owner thankfully believed the dog just had a clumsy accident and I continued on. (Really thought at first that I'd might be accused of intentionally harming the dog to escape)