On Naked and Afraid last Sunday a man got the sap of a tree all over himself which proceeded to scab up and cause burning pain on his skin and joints. I've never heard of trees like this. Here's a rundown on the most dangerous plants in the world. Don't touch that tree!
http://www.planetdeadly.com/nature/most-...ous-plants
http://www.planetdeadly.com/nature/most-...ous-plants