You were in Sans room talking to him when the topic of Sans' Gaster Blasters came up.
"So you're saying that your 'Gaster Blasters' are actually skeletal dragons?" (Y/N) asked Sans.
"Yes."Sans said calmly.
"Ok. Prove it." (Y/N) said.
"Fine. Don't freak out." Sans said. Then his eye started to glow yellow and blue and a large skeletal dragon appeared behind Sans.
"Wow"(Y/N) said staring at the dragon.
The dragon had a blue eye and a yellow eye and large skeletal wings. It was so majestic!

"Sans! (Y/n)! Are you in there?"
It was Swap!Sans.