I had heard the advice: if you are chased by a lion, climb a tree. That advice does not look so good now. This lion is maybe 4m off the ground, in a tree. Maybe the best advice is not to get in the situation in the first place!
She is clearly unafraid to be this far off the ground. I used to live with a clowder of cats, and like them, this lion likes looking down on the world.
Both of these image were shot with the Sony 135mm GM lens on a Sony A1, at ISO 100 f/1.8 1/5000 against the bright winter sky – I had to bring up the shadows to show her in more detail, but the images are not cropped.