In the book To Kill a Mockingbird, what dare of Dill's does Jem accept?

Towards
the end of , Dill bets"The Gray Ghost against two Tom Swifts"
that Jem will not knock on the Radley door. Jem is extremely afraid of awakening the
malevolentand makes several excuses as to why he cannot knock on the door. Jem tells Dill that
Boo will more than likely chase him out of the yard and end up killing him. Despite Jem's
insistence that Boo would murder him if he carried out the bet, Dill continues to criticize Jem
for stalling. After contemplating for several days, Jem reasons with Dill to
simply slap the side of the house instead of knocking on the door. Dill accepts
the bet, and Jem ends up slapping the side of the house. After Jem slaps the Radley home, he
bolts out of their yard, and the children follow him back to ' porch.mentions that as they
stared at the Radley home, they thought they could see an inside shutter move
slightly.