Imagine Damian constantly boasting that he is going to be taller than Tim, and one day coming out of his room to find out that he hit a growth spurt and he is, in fact, taller than Tim, but instead of being happy about it, he is just kinda sad. Damian pretends he isn't, but he keeps giving Tim tips on how to appear taller until Tim tells him that it doesn't matter that Damian is taller than him now, he'll always be his little brother.
And yeah, sorry about the word vomit.