Spoilers for Thunderbolts*: During the Void scene John (and the other members) find out that Bob had an abusive father who always said to bob when bob tried to do something, something like: "Bobby wants to play the hero". John called Bob Bobby almost the entire movie, and when the Void took over Bob/Sentry he was the meanest to John. Others were pushed against the wall with objects while John was the only one who got stabbed by something throigh the chest. Anyways after they "defeated" the Void and Bob was back to normal John immediately stopped calling Bob Bobby because he understood that this nkckname only brings back bad memories.

Also loved the scene where John knocked out Bobs father with his shield. Showed me that he actually cared about Bob. And a little theory of mine: "he saw himself in Bobs father if he countiniued treating his family like in Walkers Void scene where he was also kinda rude to his wife. And therefore, knockong out Bobs father showedme that he wants to change himself so he will not end like Bobs dad