Haha you guys have to check out the video clip. He basically whined and panicked like a little boy. I guess even with a tough image, there are still things that this maknae is afraid of.
Anyway, the story is that Mir injured his back while doing an army exercise, though he still carried on the finish the practice. He was later brought to the infirmary and the doctor needed to give him a shot.
Mir soon realized what was going on and started panicking and and kept asking the doctor to be gentle. Though I feel bad that he is injured the way he whined and all is just too funny. Who could have thought that he is afraid of needles :P
But he did really well on the show, fighting Mir!