Three paramedics were boasting about improvements in their respective

ambulance team's response times.

"Since we installed our new satellite navigation system," bragged the first

one, "we cut our emergency response time by ten percent."

The other paramedics nodded in approval. "Not bad," the second paramedic

commented. "But by using a computer model of traffic patterns, we've cut

our average ERT by 20 percent."

Again, the other team members gave their congratulations, until the third

paramedic said, "That's nothing! Since our ambulance driver passed the bar

exam, we've cut our emergency response time in half!"