the lack of trousers/coat is placing you in a more natural state
you've got no [less] barriers placed between you and 'the world'.
you have a "top" which you'd wanted to pull down, covering your
lower portions... this might be an effort to extend your intellectual
understandings into protecting your 'baser' instincts [ineffectually].
the dog here seems to be representing your 'spiritual guides'
(loyal companion), who are unable to communicate [directly]
with you due to an 'injury' of some kind.
the roller coaster idea is speaking of profound 'movements' due for
you on the horizon (in the near term i figure). Will is always in
motion, and never static -- it's quite good to have it unencumbered
by judgmental thoughts (naked and unafraid).