nate: you two were stuck at the airport for three hours after a delayed flight due to a thunderstorm. he lent you his jacket and offered to get you a taxi.
sammy: you guys were standing in line for a ride at an amusement park that took forever. sammy noticed that you were just as impatient as him, so he offered to get you some cotton candy instead.
gilinsky: he helped you shoo a creep hitting on you at a bar by pretending he was your boyfriend.
johnson: you were both patients at a hospital; he broke his leg and you broke your arm. the two of you were in for a long stay and ended up having rooms across each other.