"Jem threw open the gate and sped to the side of the house, slapped it with his palm and ran back past us..." (pg. 15). This quote shows that Jem is brave because with all of the rumors following Boo Radley it was a possibility that Boo could of came out of the house, catch Jem, force him back into the house, and do god knows what to him.
"Jem looked at me furiously, could not decline, ran down the sidewalk, treaded water at the gate, then dashed in and retrieved the tire." (pg. 38). This quote shows that Jem is brave for the same reason as before, that with all of the rumors following Boo Radley it was a possibility that Boo could of caught Jem and keep him from going out of the house or at the worst, kill him.
The Back Window
""I know what we are going to play. Something new, something different." "What?" "Boo Radley"" (pg. 38). This shows that Jem is brave as even though they run the risk of getting in trouble with Atticus for playing the game in the first place or from the Radley's themselves they play it anyway.
"We're askin' him really politely to come out sometimes, and tell us what he does in there - we said we wouldn't hurt him and we'd buy him an ice cream." (pg. 47). This scene shows Jem being brave because he is risking being caught by Atticus, in which he had already caught them playing the "Boo Radley" game and told them to stop messing with the Radley's, so they run the risk of getting into more trouble.
"He regained his balance and and dropped to his knees. He crawled to the window, raised his head and looked in." (pg. 53). This scene shows that Jem is brave because he is risking himself and the two others of being caught on the Radley's back porch, in which they can either get in trouble by the people who catch them or whoever caught them could decide to put matters into their own hands.
"In the waning moonlight I saw Jem swing his feet to the floor. "I'm goin' after 'em."" (pg. 57). This scene shows that Jem is brave because he is going back to the Radley's yard after he was already shot at with a shotgun for being on the Radley's porch before.