You were just messing around, and making an attempt to summon a demon. Since you didn’t really think it would work..

You had made the summoning circle..but nothing

“Psh..knew it wouldn’t work. What a joke!”

You say with a chuckle, but then get a papercut. You wince, and a drop of blood falls onto the summoning circle. Then it starts to glow..and..there he is. A demon..