So, this happened

I walk these animals on a Y-leash, as shown below (note also that Banjo, the fawn, now looks small compared with the swaggering beast next door).

They both wear Halti collars because otherwise Banjo pulls me on my face. Annie doesn't like hers. Today she randomly decided to try rubbing her snout on the sidewalk to scrape it off, but Banjo forged ahead, and the nature of the leash pulled her forward while she had her snout tucked under. So, she went ass over head and did a little summersault in the road. She sprang right back up on her paws and trotted along, leaving me gaping and thinking, "Did that just happen?" It did. 

Unrelated: ANNIE ATE ANOTHER TAG OFF BANJO'S COLLAR. WTAF.