A human soul is stuffed into King Sombra's body. Having no idea what's going on, and thinking he is in some kind of coma, he just casually strolls into the Crystal Empire.
A man wakes up to find he's inhabiting the body of a cartoon horse who wasn't exactly Mister Popular, judging from how shocked the locals are when he says things like 'please' and 'thank you'.
Human isekai'd into Equestria, regular stuff, right? Wrong! He knows nothing of the show and he took over the body of Prince Blueblood. Shenanigans ensue.
A human living in Canterlot castle is given to Queen Chrysalis as part of peace negotiations between Equestria and the Hive. Celestia knew she shouldn't have let Luna finish the negotiations herself.
Waking up in a tree usually doesn't mean its gonna be a good day...today on the other hand I find it to be the opposite...at least in the short run as i find myself in a world of ponies