If a hallucinogenic experience were to cause some deep contemplation (which it often does), such might lead to a sudden and deep sense of despair. And jumping is a very easy way to stop this despair without having to plan or endanger the lives of other.
“If a hallucinogenic experience were to cause some deep contemplation (which it often does), such might lead to a sudden and deep sense of despair.”
Sure, it might, but there’s no way to be sure that those effects would happen. This is why the intelligence agencies investigated hallucinogens for various purposes and then abandoned them, because they just couldn’t be relied on for reproducible results.