Boy: Can I take that for a while? Look, you’ll see what will happen. You have to concentrate on the coffee. Watch… [coins appear in cup]
Homeless Man: Ohhh!! [laughs]
Boy: It’s for you!
Homeless Man: [laughs] Thank you! Jeez! How did you do that?  I’ve lived 55 years, and I’ve never seen magic like that. Thank you so much! Tell me how you did it!
Boy: It’s magic… I’m a magician. Take care!

I love it! His reaction put a huge smile on my face.