"I started to realize that the improv, which had saved me the year after David died it gave me some place to go, something to do. It sort of gave me a mini vacation away from my grief, those kind of games and stuff might be able to help other people too," said Sumner.
By using these games, Sumner teaches people how to let loose and be silly. It's something many of them haven't done in years.
For the past several months he's been hosting free workshops where those grieving the loss of loved ones meet up and let go.
"It sort of gives them that permission to have fun again and to move forward," said Sumner.
For Sumner it's a way to turn a lifetime of work and years of grief into something that can benefit others. "I'd give up any of this to have my boy back. But short of that how can you not use what you've done your whole life to try and help people."