"The first thing the walruses will do when they come over is start pushing at you, pressing their heads right into your stomach," he said. "Don't let them get away with that. No matter how hard they push, you have to stand your ground."

I stopped short, confused.

"If you don't stand your ground, you'll be knocked over or backed against a wall in no time," Dr. Schusterman said.

But but ... I sputtered. How was I supposed to stand my ground against an animal the size of a Honda Civic? This sounded less like "friendly and playful" than "aggressive and possibly dangerous."

"Just push back on the snout with the palm of your hand and blow in its face," Dr. Schusterman instructed. "A walrus really likes to be blown in the face."