Person A and Person B have had a (serious) fall[ing] out [a while ago], but Person B has never changed their emergency contact[;] so when they end up in the hospital[,] Person A is called[.]

BONUS: Person A comes running but tries to play it cool (& can’t).

http://otpprompts.tumblr.com/post/132019097971/person-a-and-person-b-have-had-a-serious-fall

This would be spectacular as a post-The Deep, Deep Sea Rylan/Avery fic.