man’s heart beats faster when he looks at the sun

• saw on tv in the UK
• sort of scifi
• low budget, b-movie, or maybe tv – like twilight zone
• strange mysterious feeling
• an experiment, or mutant, or something; makes the guy go faster when he sees the sun.
• heat beats too fast, like sunstroke, or heart is going to burst
• think the sun was black.. or night filter, or something

Thank you    : D