My wife plugged a canadian goose with a thinned low liner last year ... he staggered around for a minute, but walked it off & was fine. Would be the equivilent of a human being hit by a bowling ball at 80 mph ... he did better than I would have everything being equal !!
Other time, my wife wasn't playing well & she was walking up to the tee box & forgot her ball. I was standing about 20 ft away & lobbed a ball at her, intentionally way up in the air so she could see it. She must have momentarily looked away & never saw it. Came down right on her bean - she saw stars & came away with a lump, but it cleared her head & she played much better the rest of the round ... we still laugh about it.