If you check this [documentary](https://www.youtube.com/watch?v=BmVKfm45Yz4), you'll see that Borneo natives used blowpipes vs Japanese during 1944-1945. I find this sort of engagement fascinating, since the poison used in the blowpipe dart must have been fast-acting to prevent retaliation by a firearm-wielding soldier. What accounts/sources exist about these skirmishes? What kind of poison was used? What were the outcomes of the skirmishes?

EDIT:
Another [documentary](https://www.youtube.com/watch?v=RKzo0_Y3-4o).