In this clip, we see the venom of a Russell’s viper being extracted and then just one drip of it being added to a dish of blood. The effect is genuinely terrifying…
(I’m sorry for the overdubbed translation. I couldn’t find the original English version.)
Update: Here’s the original, English documentary the clip comes from. It’s 50 minutes long, but it is set to play only the relevant few minutes…
Watching the English version, we learn that the blood that coagulates in the clip is from a rodent, the Russell’s Viper’s usual prey. Obviously, this will kill the animal in seconds.
In humans, the venom does the opposite, thinning the blood until the victim dies about 12 hours after being bitten.