Scenario 1
You were studying demons in a room locked off to most of the people in the studio, only toons are allowed, and Joey because he's the one that switches out the books there. You were reading a particular book about possessions, when you see that Boris had entered the room...

Scenario 2
You just got finished recording a scene for the show, when you see that Boris isn't there for his scene, you look all over the rooms for him but he is nowhere to be seen. You look down the halls, and eventually you find him sitting in a corner, he is bawling his eyes out, because he has a big scratch on his arm...

Scenario 3
Make it up