Heat the canola oil in a large, heavy skillet over medium heat until hot but not smoking. Add the garlic and ginger, stir fry for 30 seconds. Add the mushrooms, celery and sesame oil and stir fry for 30 seconds.
Add the shrimp, soy sauce and red pepper flakes, stir fry til shrimp are pink and cooked through, 3-4 minutes. Serve immediately.