Prankster wanted to see if people would help when faced to a robbery in progress, well I guess he got more than he asked for...
NSFW because of language and blood
See what happens when you combine a solution of thiocyanate ions (on the cotton ball) and a solution form of iron(III) which has a yellowish color (on the knife).
The tree in these photos is known as the Dragon’s Blood tree and it is a rare type of tree that originates on a small group of four islands in the Indian Ocean. The tree contains a beautiful red sap which is called Dragon’s Blood that has been used as a medicine to treat a variety of ailments and can supposedly increase the potency of witchcraft spells for sexuality, banishing, love, and protection.