The Limbo People (who are hominids with intelligence somewhere between chimpanzees and humans) have long survived by hunting wild boar. They use spears with wooden hafts and flint tips. They are a stone-age people. They don't have fire.
The boars live in the forest which covers the whole world (as far as the Limbo People know) except for the occasional clearing. The undergrowth is thick and the boars run through tunnels they make by eating the plants on which they survive.
The problem for the People is that of getting through this undergrowth. The boars, on four legs, find it easy. The humans find that their best mode of travel is by doing a sort of limbo-dance through the low tunnels.
The Limbo People can limbo very quickly but how do they catch and kill the wild boar with only their spears? Limboing forces you to look skyward so how do you see the prey?
Limboing is their normal mode of travel between clearings for all purposes not just hunting.
Crawling belly down does not work because you can't throw a spear from that position.
These people are spear hunters not trappers. They haven't yet invented traps.
They haven't harnessed fire because they live in a rainforest. They eat the boar flesh raw.
Apart from their spears, their only other tools are flint hand knives and hand axes. These are simply chunks of flint that have been split by banging together. They use them to skin the boar and to break into their bones for the marrow.
They can make clearings using their hand axes but it is a very slow job and the undergrowth tends to grow back quickly.