2015 was a standout year for grime, and Section Boyz are poised to blow. The South London-based rap crew's song "Lock Arff" was one of the best songs of the year, and they've earned themselves a MOBO Award and a spot on the BBC Sound of 2016 list as well. "Mad Man Ting" shows off just why these guys are next up: irresistible energy and raw bars over aggressive, shifting production. The sum is greater than the parts, and they know it. Watch above.