Nothing like a good prank... the Jackass guys have this oldster laughing her *** off! Gawd, the fun they could have with a Prius...and scaring the bejesus out of folks.
After getting the bejesus scared out of her a million times, one would think she'd be ready the next time she opened the door... or even better, plotting revenge. My sons and I loved scaring the **** out of each other and it continues to this day... you ALWAYS have to be ready to one up the competition. If we were in the same house pranks often happened at the same time.
My kids and I played hide and seek 'Kato' style. (Named after Inspector Clouseau's manservant, charged with always keeping the inspector on his toes.) Instead of hiding quietly and waiting patiently to be found, I'd wait until they walked past, then jump out and roar like a bear. They loved it, even though they'd jump every time. One day, Mom came home in the middle of a game....and I couldn't resist. Poor woman. Years later, she's still not comfortable coming home to an apparently empty house.