The sulfur cloud contracted into a thick column of smoke that vomited forth thin tendrils; they licked the air like tongues before withdrawing. The column hung above the middle of the pentacle, bubbling ever upward against the ceiling like the cloud of an erupting volcano. There was a barely perceptible pause. Then two yellow staring eyes materialized in the heart of the smoke.
Hey, it was his first time. I wanted to scare him.
And I did, too. The dark-haired boy stood in a pentacle of his own, smaller, filled with different runes, three feet away from the main one. He was pale as a corpse, shaking like a dead leaf in a high wind. His teeth rattled in his shivering jaw.
Bartimaeus wants to scare the boy. Select the words that show the boy's fear from the last paragraph.