An 85 year old woman could easily be knocked over by an excited Newfy pup, even if it was not scared.
As for aggressiveness, our Newf (long gone) used to go crazy when someone rang the door bell. I'm sure the UPS driver never entertained a thought about coming back at night and breaking in, LOL. (OTOH, he could have walked around to the back door and entered quietly and been greeted with great enthusiasm!....just don't ring the door bell!)
Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
Postscript...
On the windshield of my truck this morning found the nicest handwritten thank you letter with a picture of pup...
Sometimes a person is just in the right place at the right time.