Before becoming a broadcaster, Si had long dreamed of becoming a scientist. Fast forward 30 years and Si is finally living his dream!
For Scientist Si's first experiment he wanted to see if could make a lightbulb light up by microwaving it in a bowl of water... But Gary was quick to admit he didn't think it was the safest idea.
Can Si finally achieve his dreams of becoming the next Albert Einstein, or will the whole thing be a huge flop? Watch the video above to find out
WARNING: Do not try this at home!