Horror of Horrors!

You aim the spray can at the open suitcase and press the button.
A thick cloud of mist whooshes out of the nozzle. It blankets the suitcase, hiding it completely. You think you see a dark shape forming inside the mist. You lean closer to get a better view.
It's Ralph!
You reach down to pet him. He snarls and snaps at your hand. You jump back, startled. Ralph doesn't remember you. He thinks you're his enemy.
Ralph springs at you and slams into your chest. You fall backwards. Your head hits the pavement. Ralph gives a ferocious growl. He bares his fangs and lunges for your throat.
Frantic, you jerk up your arm to protect your throat. Ralph buries his teeth in your jacket sleeve.
As you struggle, your other hand finds the open suitcase. You grope inside.
Your hand closes on something round and thin. You quickly pull it out. You are holding a black wand. Its silver tip glows in the dim light.
Do you use the wand?