The plastic cup getting subjected to spells grows arms and starts banging on itself like a drum. Doctor looks pleased for a split second then shakes his head and abruptly halts his playing. The cup's arms disappear in a spark and the room is silent again.

"No no that's not what we need for this. Come on Doctor, be more aggressive." He scolds himself and leans back in his chair, temporarily defeated. Glancing around the room, he finally notices Frisk at the doorway.

"Oh!" He waves a hand at them.