Braxton, who is an influencer for Under Armour and has landed a role in the awaited dirt bike movie produced by Will Smith and filmed here in Baltimore, is auctioning off his bike to benefit B-360. B-360 is a local program that aims to educate and attract more students to science, technology, engineering and mathematics — or STEM — using dirt bike culture while also aiming to help the community be safer and come to solutions when it comes to dirt biking, which is outlawed in the city.