Dog Parkour

“What’s our plan!?” I shouted, raising my voice to be heard as one of Purity’s blasts crashed down to the street to our right.

“Get her attention!” Grue replied.  He pointed,  “Up!”

Bitch whistled, and Brutus surged forward in our pack.  Brutus turned partway into an alley and leaped.  He latched his claws on one wall of the building, half turned, then leaped across to the neighboring building.  Zig-zagging upward, he ascended to the roof in a span of seconds.