Rusty's addiction!
When I walk my dog in the field opposite my house, I usually take along one of those long plastic tennis ball flingers. This is because I got tired of nearly putting my shoulder out to produce a throw that it took him three seconds to retrieve. These devices are marvellous and once you get the knack, you can launch that tennis ball really impressive distances.
I’m pretty good at it, even if I do say so myself. If tennis ball launching were an Olympic Sport, I would definitely make my national squad.