After my sister died suddenly and tragically, about ten years ago, our whole family was barely functional. I am no sensitive plant - I'm an old courtroom lawyer and I have investigated horrifying death cases, sat through autopsies, etc. My dad's a combat veteran of WWII, my mom is one of the toughest women alive, my husband is a tower of strength. We were ALL basket cases - could barely talk, barely walk through the funeral. A friend of mine persuaded me to take a Valium (I NEVER take drugs), I still lay awake all night shaking and staring at the ceiling. At her memorial service there were some moments of faint humor as we shared incidents from her life with friends, but the laughter was subdued, and brief, and always followed by a little catch and a sob as we all realized that baby sister would never make us laugh again.
I'm sure different people react in different ways, but I cannot IMAGINE behaving at a family funeral the way Wellstone's family behaved.