Everyone goes above and beyond in their line of work on occasion, and this is certainly true of Hollywood's finest.
From method thespians who literally became the character they were playing, to on-set meltdowns that hint at the industry's dark underbelly, the results can be spectacular and terrifying in equal measure when actors take things that bit too far.
The lengths certain method actors have gone to for their roles is enough to make your head spin. Some have refused to bathe for weeks to get into the mindset of an unsavoury protagonist while others have crossed the line between madness and sanity for a psychopath role. Often going to these extremes has resulted in genuine authenticity and Academy Awards, but at other times nothing but awkwardness among the cast and crew, and years of bad PR for the star involved.
That said, it isn't just the method actors who have taken things too far on set. There are times when stars you wouldn't tar with this brush have gone off-script and lost their sh*t for a moment, only for the entire incident to form part of the final cut.