Crab-Dog-Alcohol Hypothesis.
A behavioural anomally known to exist in Costa Rica. When a human is sober, they can touch the local dogs with ease, while crabs will run away as fast as they can. When the same human is under the influence of alcohol, dogs run away almost instantly while the human can reach down and touch crabs with ease.
I tried touching the crabs on the beach, but it didn't work until I was drunk because of the Crab-Dog-Alcohol Hyphothesis.