It will literally rain acid on you

If a storm's coming, the manchineel tree is not a place you'd want to run to for shelter.So, first step of caution - do not touch it.When it rains though, the situation gets even worse.

One of the most potent toxins contained in the sap is phorbol, a powerful water-soluble irritant that is picked up by the falling rain and scattered on anyone standing underneath (you're better off just standing in the open and being rained on, seriously).