UPDATE: As I had cautioned, The Mirror indeed had its "facts" muddled. According to this October article in Vice, the photos seen here are actually from the woods around the University of Virginia's Mountain Lake Biological Station. No idea if the fellow was actually tripping or thought he was a Siberian tiger. Shame, as the below story is quite delightful.
Original uncorrected post:
This gentleman from Liberec, Czech Republic was reportedly tripping on LSD to combat depression when he began to hallucinate that he was a Siberian tiger. He then stripped naked and pursued imaginary prey for miles along the Czech-Poland border where he was spotted on trailcams. According to the Mirror, "police said that, because the man did not have any drugs with him, he was only fined and will not face any further charges."
If this story is true, I hope the fellow had fun and that the experience alleviated his depression.