The plaintiff sued a local restaurant, claiming that she injured her teeth, gums, and mouth when she bit into a hamburger that contained a large, jagged piece of glass. The plaintiff called to the stand a waiter for the restaurant, who testified that, when he heard the plaintiff scream, he looked in her direction and saw her remove a piece of glass from her bleeding mouth. On cross-examination, the defense asked the waiter, "Isn’t it a fact that three months ago you were fired by the restaurant for serving drinks to your friends and not charging for them?" The waiter responded, "Yes, but I wasn’t trying to steal anything. I just forgot to charge them." The defense then asked, "Isn’t it a fact that last month you threw a rock through the plate glass window at the restaurant?" The waiter replied, "That’s not true; I was there but I didn’t throw the rock." The defense then offered the testimony of a witness who was prepared to testify that she saw the waiter throw the rock through the restaurant’s window.