One morning he and a colleague went golfing. Both men drove their first shot into heavy rough, then went over to comb through the underbrush.
"I see mine," Charlie called. A second later as he bent over to pick up the ball, he let out a bloodcurdling scream. "A snake bit me! Do you see it? Is it poisonous?"
"No," Professor Wilkins replied.
"But my arm is red and swelling up!"
"That snake isn't poisonous, it's venomous. Poison is ingested while venom is injected. There is a difference you know."