Actually, lions can swim just as well as any cat can. They just dislike water, like most cats do. ^^ Some prides of lions have even adapted to areas of Africa to which they are forced to swim through channels of water in order to get to their prey and have body builds that aid in this process, such as stronger and bigger chests and physiques.

With that said however, I doubt any of them are doing any high dives off cliffsides before hand, but yeah, I don't think this question will ever truly be answered indefinitely. All we can do is speculate. ^^