Apparently his hair extensions are to blame.
http://www.fieldandstream.com/blogs/flytalk/2011/03/has-steven-tyler-ruined-fly-tying-world
Wow… that’s shocking (sorry, couldn’t resist). In all seriousness though, apparently your RV can get what’s called a ‘hot skin condition’ that can shock you and even kill you. Mike Sokol, an RV electricity expert, explains in this video: