The next instant he was out, and "going on" like an Indian; yelling, laughing, chasing boys, jumping over the fence at risk of life and limb, throwing handsprings, standing on his head--doing all the heroic things he could conceive of, and keeping a furtive eye out, all the while, to see if Becky Thatcher was noticing.

But she seemed to be unconscious of it all; she never looked.

Could it be possible that she was not aware that he was there?
He carried his exploits to her immediate vicinity; came war-whooping around, snatched a boy's cap, hurled it to the roof of the schoolhouse, broke through a group of boys, tumbling them in every direction, and fell sprawling, himself, under Becky's nose, almost upsetting her--and she turned, with her nose in the air, and he heard her say: "Mf! some people think they're mighty smart--always showing off!" Tom's cheeks burned.

He gathered himself up and sneaked off, crushed and crestfallen..