Wow! Children Catch Water Snake Using Bamboo Net Trap - How to Catch Water Snake in Cambodia. It is a one way in trap. Anything can go in but can't get out. The creature get poke by the Bamboo sticks at the center of the cage where it enter into the cage. The opening is big and it get narrower until to the middle of the trap it become tight squeezed. The creature can squeeze through. But when it try to come out it will get poke by the Bamboo that stick out. Type in your YouTube search bar on how to make traditional Cambodian fishing trap. You might find videos of how it work. Observe at the center of the trap where the opening become close like but still allow anything big enough to go in.