Stella the Yellow Lab has no need for convention.
Sure, most dogs slow down before coming to a complete stop, but Stella isn't most dogs. Instead of laying off the gas to slow her roll, Stella does the canine equivalent of pulling the car keys out of the ignition — she simply stops mid-stride and belly flops on the ground, legs splayed out behind her like a Thanksgiving turkey.
It's an adorably weird quirk that was uploaded to YouTube, so the whole internet could head-scratch over the cute canine oddity. The uploader assures concerned viewers that Stella is completely healthy and she just uses this unique braking technique "to cool down on the grass after she's been fetching and playing." Keep on being you, Stella.