I was impressed at the efficiency of the nurses; the actual shots only took a minute even with them stopping to try to soothe him. Of the five, his reaction was not the most violent or the loudest, or even the calmest (the award for which goes to Katrina who mostly just glared at the doctor who administered her shots). I remember getting my shots, one in particular that made my arm harden like a rock for several days.
As a parent, its hard to watch my children in pain, even if I know that it's for their benefit. It has not gotten easier. It's hard to explain to someone (a child, in particular) that the pain he was going through today would help benefit him in the long run.
There's a metaphor in there somewhere . . .