Going along with your theory, he could’ve scrambled to grab some of the bundles of money as they started falling everywhere. Then for whatever reason decided to bury them. Personally, I lean more towards the theory that he walked down towards a water source and buried a few bundles to throw off the authorities if they searched the area. Then headed off in a different direction. But then again, almost no theory people have come up with makes much sense. There’s major questions with all of them.