Sentence:  "I bleeve I could smoke this pipe all day," said Joe. ""I" don't feel sick." / "Neither do I," said Tom. ""I" could smoke it all day. But I bet you Jeff Thatcher couldn't." / "Jeff Thatcher! Why he'd <WSD>keel over</WSD> just with two draws. Just let him try it once. "He'd" see!" 
Meaning of the word marked with <WSD> tags:  To collapse in a faint; to black out, to swoon.