You can't take something back after you give it away.
Jack had given his old bike to his younger brother Zack for his birthday, and was recently asked by his friends to go bike riding with them.
Jack wants to go on the bike ride with his friends.
Jack asks Zack if he can borrow the bike for a while.
Without asking Zack, Jack takes the bike back and joins his friends on their ride.
Zack allows his brother to borrow the bike and Jack spends the evening with his friends.
Zack notices his bike missing and frantically searches for it around the neighborhood.