This condition is classically described as sudden onset severe spinning attacks that lasts only a few seconds to minutes triggered by a head position change. Although scary, this is perhaps one of the easiest conditions to cure and is due to loose particles within the inner ear. [more info]
Jason Day collapses at US Open with vertigo. NY Post 6/19/15
Jason Day's vertigo at the 2015 US Open: What exactly is it? CBS Sports June 21, 2015.