Scary indeed, if unarmed. I much prefer to have something of my own for which to argue with. I usually pack my rifled 12 bore with the Dangerous Game "Gualandi" slug. They are slightly pointed, and of hard lead.
While we don't have any rhinos or lions, I think these might spoil their day, if landed correctly. They are quite accurate to 30 yards in my Mossberg's 24" rifled barrel.
Marketed by Ballistic Products in the States, the loaded ammo is sold by Challenger Products in Canada.
This ammo, runs the 496gr. slug at 1,610fps.

https://www.youtube.com/watch?v=TCxA2IYneqM