To follow on Steve's post, there are now walking safaris in some places. You may have seen a recent Youtube video by a (in)famous YouTuber (TML, initials), on getting on the ground so you can shoot at eye level lions and the painted dogs. Not sure personally I would do this (with a lion or painted dog) though for the first time ever our guide in Tanzania allowed us to do that with a cheetah (we stayed next to the vehicle). It was quite a thrill when it ran by us. Got some of my favorite shots that way, like this one: