When the employees of a restaurant attended a fire safety seminar, they watched a fire official demonstrate the proper way to operate an extinguisher.

When the employees of a restaurant attended a fire safety seminar, they watched a fire official demonstrate the proper way to operate an extinguisher. Pull the pin like a hand grenade, he explained, then depress the trigger to release the foam. Later an employee was selected to extinguish a controlled fire in the parking lot. In her nervousness, she forgot to pull the pin. The instructor hinted, Like a hand grenade, remember? In a burst of confidence she pulled the pin -- and hurled the extinguisher at the blaze.