My 62 year old brother, after getting me into riding longer distances, motivating me to get the recumbent bike, and planning a cross country ride for this spring, had a severe stroke last fall. He can currently walk very slow with a cane, and will probably never have much use of his left arm.
So, I got a used delta trike for him, set it up with a dual brake lever so both front and rear brakes work from the right hand brake lever, and added turn signals and brake lights. He hasn't been allowed to have the trike yet, but he's about ready for it. He is currently using a little trainer with his own clipless pedals, which we will put on the trike so that his left foot won't slip off the pedal.
Anyway, he is very excited about getting to ride the trike, and his biking friends want to be there when he takes his first ride.

He was always hard core pedal only, so I don't know if he'll ever let me add an electric assist.