Rain and Kim Bum are a good pairing as they are both especially good at physical comedy. It was a fun drama.
One of my favorite moments was probably not scripted. Rain had just been bumped out of the Kim Bum character and was dying on the street. The old surgeon ghost realized what was happening and jumped into the EMT, who then had to pick up Kim Bum to lay him on Rain. I’d noticed Kim Bum was stocky, but really noticed it when the burly EMT looked like he was getting a hernia trying to lift Kim Bum off the ground.