You'll soon be able to strap on the Master Chief's helmet from Halo to protect you in real life. The prototype helmet has already been approved by the Department of Transportation which means it could be protecting your melon as soon as 2015. Cortana not included.
“Whether you're on a Honda dirt bike, a custom Harley, or a vintage Vespa, the Halo Master Chief Motorcycle Helmet will offer the full-face protection preferred by Master Chief (and savvy bikes everywhere). A.I. not included,” reads the description on helmet maker NECA's site.
The company is working with current Halo developer, 343 Industries, to produce motorcycle helmets, prop replicas, board games, action figures and figurines all based on the Halo series.