You shouldn't brag to others.
Tanner is a player on a team sport and just made a big play.
Tanner wants to celebrate the play with his teammates.
Tanner thanks all his teammates for their parts in the play that he was able to make and tries to get them to do high fives.
Tanner describes to his teammates how it was him and him alone that pulled off the big play and tries to get them to do high fives.
Tanner's teammates are excited about the play and appreciate Tanner being humble.
Tanner's teammates are annoyed by his boasting and wish he was a better teammate.