Re: How do I respond to ''How did you do that?!''
You could combine a retort with a neg by asking "[Don't you know/Have you never been told] magicians never reveal their secrets?" (As if it was common knowledge)
Or, "Didn't you catch it the first time?" and change topic, optional Roll Off.
SK's post is mad suave. Adding a flair of poetry and trivia can make you seem like a person of many talents (dhv).
I really like the "Once is magic, twice is education" line.
If you wanted to put your target into a state of confusion (which can be useful), you can say with a straight face "I didn't" and move into a topic change.
you are a soul playing a game of human
might as well unlock all the secret areas