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

“Pull the pin like a hand grenade,” he roared, (typical ex army)

“Then depress the trigger to release the extinguishing agent.”

Later an employee was selected to extinguish a controlled fire in the live demonstration area.

In his nervousness, he forgot to pull the pin.

The instructor roared,

“Like a hand grenade?”

“Like a hand grenade, remember?”

In a burst of confidence he pulled the pin… ………..

and hurled the extinguisher at the blaze