A mystery diner at a cafe left an eye-watering $112 tip for the waitresses who served them. The kind-hearted customer purchased a relatively modest breakfast at the On Your Mark Cafe in Staten Island, New York. But that didn’t stop them leaving the huge tip for the waitresses - all of whom have developmental or intellectual disabilities. A video recorded by cafe manager Nicole Jablonski shows one waitress called Jen pick up the bill and realise how much was there. She slowly begins counting out the money, as all her colleagues watch on in amazement. As the number keeps growing, they can all hardly contain their delight as she reads out the final amount left - $112. The staff - who all shared in the communal tip - begin high fiveing one another.