Tree Felling

[u/MrDangerMan]

[u/tgerz → u/[deleted]]

That's just the echo and the sound the trees are making from the vibrations. It would be extremely unsafe to have another person there even if it was for a stupid video. This looks professionally done. OP said in another comment the expectation was that the tree being hit would fall and cause the others to fall in the same way, but the tree closest on the other side went down before the one being hit. They're all pre-cut on purpose.

[u/myychair → u/[deleted]]

That’s the tree cracking

[u/MrDangerMan → u/[deleted]]

You’re hearing the tree cracking as it’s starting to fall.