Up ahead, quite suddenly and as if to illustrate the subject they had been discussing, a boy in a black turtleneck sweater suddenly had a convulsion. He fell on the road and began to snap and sunfish and jackknife viciously. His limbs jerked and flopped. There was a funny gargling noise in his throat, aaa-aaa-aaa, a sheeplike sound that was entirely mindless. As Garraty hurried past, one of the fluttering hands bounced against his shoe and he felt a wave of frantic revulsion. The boy’s eyes were rolled up to the whites. There were splotches of foam splattered on his lips and chin. He was being
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