Mouse droppings?!

In New Zealand the professor took up skydiving. 

“It’s such a delightful feeling of freedom,” the professor explains his latest hobby. “The only thing that rather bothered me, right after the first jump, is the fact that I lost my green bow tie! I felt quite naked without it. Luckily I could laugh about it after the first shock. However, needless to say I immediately asked my assistent to purchase another green bow tie!”