An example usage case would be operating something like a cargo - drone for agricultural purposes. (law.stackexchange.com)
I suppose there are other usage case scenarios such as a really bad Santa holding a kid with one hand and reading on the other. (goodereader.com)
Between the four of us we had a pretty good spread of usage cases, from Miss CB being a fairly light user (a lot of messaging, some phone calls, and some web browsing) to crazy «ole Bla1ze being on his BlackBerry more than any normal person should, doing just about everything he can think of. (crackberry.com)