Bucky, when he was still under mind control: *sent to follow after Tony*
Tony: *in college staring at his term papers and a billion projects*...*starts making the craziest caffeinated drink possible*
Bucky: *stares slowly becoming horrified*
Tony: *tops it off with with a tea leaf before chugging it* LETS GO!
Then years later, Bucky watches Tony make the same horrifying drink*
Bucky: NO! *smacks out of his hand* that drink is repulsive!
Tony: WTF?! Barnes, I have 20 projects to do before the end of two months!
Bucky: YOU and THAT *points to the drink* have haunted me for years! *picks him up* it is called rest and a day of break
Tony: *confused for the rest of the evening*