You grab the tail growing out of you and your heart starts beating faster, you pant a couple of times in panic.
"Whoa," you say. You don't feel anything at first, but then feeling fills into the tail as if the nerve endings were filling in the new appendage.
"Okay...nice trick." You say, trying to keep yourself from panicing any further. You look at the tiger as he (or she who can tell?) devours the sandwich you carelessly dropped, you don't actually see the tiger smile, but you have a feeling that it probably is.
"Now for an encore...how about making it go away." You say. For answer the tiger just lies down in front of the cage and licks it's lips slightly.
"Another treat? Gosh that was my only sandwich." You say. The tiger seems to shrug (which you didn't know tigers could do).
"I've got gum." you add hopefully. The tiger lets out a big yawn. Clearly gum's not going to cut it. You could threaten it somehow, or you could pop off to the snack bar in hopes of buying a suitable bribe.