Short Fuse

You Gain a short piece of twine sticking out of your hair. When you gain this feat, you get the following bonuses:

• You gain proficiency in bombs.
• You have disadvantage on any wisdom throws to stay calm rather than get angry. If failed, your fuse lights and burns until calm or doused with water.
• As a bonus action, you can light your fuse. 
• Twelve seconds after you fuse being lit, it reaches your head and you explode. You take no damage but you and everyone within 30 feet of you takes 4D10 fire damage and everyone within 30 feet is thrown 30 feet directly away from you and knocked prone. All unprotected flammables in the area are ignited. You take 1D6+4 psychic damage.
• Your fuse grows back after a long rest.