Sentence:  Gradually Simon's powers of movement returned. He felt them coming back. It was a growing warmth, an inner blooming. He was able to say, “Guess I went a little <WSD>zonky</WSD> back there, huh?” 
Meaning of the word marked with <WSD> tags:  Weird, odd, eccentric.<ref>John Ayto, "The Oxford Dictionary of Slang", Oxford University Press, 1998, p. 427,[https://archive.org/details/oxforddictionary00john]</ref>