Jaques d'Alltrades wrote:
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Felling a whole tree is easier/safer if you cut it two or three feet
from the ground.

But when it begins to go, get out of the way quickly, as the cut bole
may kick backwards: and often, the trunks of smaller trees may spring
back like a battering-ram when they hit the ground if the branches have
a lot of springiness in them.

I think it's the first rule when felling a tree isn't it? Make sure
you have planned your escape route away from the base of the tree and
use it *immediately* the tree begins to fall.

This is one of many safety rules to be observed when felling trees,
that's why I said a bit of reading and learning is prudent before
doing it. Many of the rules will apply (and be important) whatever
sort of tool you are using to cut the tree. It's not just using a
chainsaw that makes the job potentially dangerous if you're not
careful and/or are not aware of the risks.

--
Chris Green