This park has the usual airlock type entry with a gate from the outside leading to an enclosed area where you can unleash your dog, then a gate into the park. Seeing a newcomer, dogs always run to the gate, and it's up to us owners to call our dogs away from mobbing and cornering the new dog.
I was talking to my friend Amy, Sheltie-person and a primary founder of the dog park, when Miro followed some other dogs to the south gate.
When I called to him, he stuffed his toes in his ears and sang, "I can't hear you," so I started toward him. Two women were fussing over their dogs in the airlock, one with a medium-sized dog and the other with a small dog she was hugging to her chest (good way to make the dog feel frightened). The one with the medium dog opened the gate into the park at the same time that the woman with the small dog opened the gate to the outer path.
Apparently neither woman could read the signs telling people NOT to do that. I ran. Before I got to him, Miro slipped through both gates. Neither woman reacted when Miro walked past and started trotting up the hill, fortunately not toward the parking lot.
I barreled past both women, clapping my hands and calling Miro to come, trying for the "happy voice" despite that heart-in-the-throat feeling. Miro turned around and would have charged right past me, but I was used to this trick and lunged for his collar, bringing him to my side.
I shouted at small-dog woman loudly enough to make her cringe, "Never, EVER open both gates at the same time!" I was very restrained. I did not tell her she was an idiot. I did not knock her down and jump on her. I did not throttle her or kick her fat behind. I just contented myself with fantasizing about doing those things and more while escorting a happily panting Miro back into the park.