Lord Blackwood: Sherlock Holmes... and his loyal dog. Tell me, Doctor, as a medical man, have you enjoyed my work?
Dr. John Watson: Let me show you how much I've enjoyed it...
[He rushes at Blackwood, Holmes holds him back]
Sherlock Holmes: Watson, don't! Observe...
[Watson sees Blackwood's trap]
Dr. John Watson: How did you see that?
Sherlock Holmes: Because I was looking for it.