Pianists learn to play with a robotic thumb in just one hour
Imperial College London
A man has gone viral after showing off his giant thumb that can extend to 5 inches and appears to grow.
Jacob Pina is from Westport, Massachusetts and has risen to viral fame thanks to his unusual digit.
While in a relaxed state, his thumb is an average length but Pina is able to extend it to around 5 inches long.
In clips on his TikTok account (@jwpina), Pina has displayed what his thumb can do, including multiple clips where he places his hand under running water and stretches his thumb out as it somehow starts to grow.
Pina has also shown how the size of his extended thumb compares to household items, holding it up against a paper cup, a banana and a house phone.
His 2.2 million followers have been left shocked and intrigued by his unusual ability, with some unable to believe what their eyes are seeing.