Given the task definition and input, reply with output. In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: Much like in Hair-Raising Hare, Bugs (after being flooded out of his rabbit hole while sleeping during a heavy rain) finds himself trapped in the castle of an "evil scientist" (the neon sign outside his castle says so, punctuated with a second flashing line, "BOO"), a caricature of Boris Karloff, and needs a living brain to complete an experiment. When Bugs awakens, he is terrified when he sees the scientist ("Eh, eh, eh, w-w-what's up, doc?"), a sarcophagus ("What's going on around here?") and the robot experiment ("Where am I anyway?"), eventually running away after the terror of seeing all three. The scientist sends out an orange, hairy monster he calls "Rudolph" to retrieve him, with the promise of being rewarded with a spider goulash.
What three things made Bugs run away?