Treating a fire extinguisher like a grenade

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 press 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.