"Really Watson, how was I to know it would turn your hair green?"

Sherlock Holmes scowled across the room, where Dr Watson was steadfastly ignoring him. "Indeed," he continued. "I would not have spilt if you hadn't disturbed me."

Watson turned to look incredulously at Holmes. "Are you saying this is my fault?"

"Well, it is your fault, Watson. If you hadn't disturbed me, my chemicals would not have spilt on you. You can't blame me for that."

"Holmes, you were holding it above my head!"

"You shouldn't have moved." Holmes replied serenely.

Watson was incensed. "I just woke up!"