Can't find that one funny comic strip.

I remember what the comic strip is about but I can't find it. It goes like this: There's a party and all the seats are taken, and Syndra can't find a seat. Zed offers Syndra to sit on his lap. Syndra looks at his shadow and sits on his lap instead. And when Syndra goes to make a face at Zed, she's looking at his shadow, because he swapped places with his shadow. I can't find this comic, anyone know where it is?