Strong Bad and Strong Sad being nice to each other in Email 150. By itself, it's nothing. When you consider how they usually treat each other, however, it's pretty touching.
On a similar note, the two bonding over the band Sloshy in concert before Strong Bad learns that it isn't a metal band.
During the Maps And Minions segment of Strong Badia The Free, two characters on the same space normally fight, but there are two exceptions- one is, if you have The Cheat and Strong Mad on the same space, they will refuse to fight and instead share a hug.
Strong Bad vs. Little Girl! Strong Bad can actually talk to a small child and not say anything offensive. Especially heartwarming is the ending, where they go see the sun.
