A junior entertainer hit by a senior entertainer with milk

As you might have guessed, it was comedian Choi Yang-rak.
This story was shared by Choi Yang-rak on Lee Kyung-sil's broadcast, and the details are as follows.
In the past, Lee Seong-mi gave Im Ha-ryong the nickname "Old Man," and thanks to that, many comedians began calling Im Ha-ryong "Old Man" as well.
Im Ha-ryong is famously timid and introverted, and since he had looked much older than his age since his youth, he already had a complex about it; being called "Old Man" on top of that really hurt his feelings.
Then one day, during a shoot, the schedule was so tight that they had to have a quick meal of bread and milk before moving on to the next filming. Consequently, Im Ha-ryong sent Choi Yang-rak on an errand to buy some bread and milk.
Choi Yang-rak obediently ran the errand and brought the bread and milk to share. At that moment, Choi Yang-rak teased Im Ha-ryong—who is actually 10 years his senior—by calling him "Old Man!" Instantly provoked, Im Ha-ryong asked, "What did you just say?" Instead of stopping, Choi Yang-rak went even further, teasing him with, "Oh, can't the old man hear me? Just eat your bread!" and "You're like a toothless tiger!" Eventually, he ended up getting hit in the face with milk..
As a side note, Im Ha-ryong is famous for being a big-hearted person, so the fact that even he lost his temper shows just how much it was..
Choi Yang-rak's signature annoying teasing was truly extreme..
In fact, when Choi Yang-rak appeared on Lee Kyung-sil's broadcast to recount this teasing incident, he apologized to Im Ha-ryong, reflecting on how foolish he was at the time, saying, "I was truly in the wrong back then. That senior had a bit of a trauma regarding debuting at a later age, and I happened to touch on that..."