This video in no way proves anything, but if it's real, this should be a major point in the legalization debate. The video jumps ahead at 5:05 to about 25 minutes after the beginning, to observe the effects after smoking and ingesting marijuana.
From YT: My friend has parkinsons real bad, he accidently ate a gram of hash oil and discovered that it stopped his parkinsons tremors for 5 days. Now he takes a quarter gram a day and none of his prescription. This is my good friend and we accidently discovered that large doses of hash oil (Rick Simpson oil) releives the tremors of his parkinsons disease.