https://en.wikipedia.org/wiki/VX_(nerve_agent)
Is an oily amber substance not a green gas. Afaik gives you a painful spasm followed from the inability to operate any muscle diaphragm included so you get contracted then flacid and die from asfixia. If you happen to survive the sarcospasm you probably wouldn’t get well anyway since the agent messes the nerve receptors forever. It can be absorbed by skin contact and the lethal dose is so low that some symptoms depicted in the wiki are more “supposed” or “by account” rather than a fact fun fact some teorize it would have been what Bruce Willis puts in his car in the movie the Jackal and kills the guy that touches it after. It acts in minutes and survival rate is almost non existent without the antidote…