The common myna is probably the first or second bird you’ll notice on Maui (the zebra dove being the other). Occasionally you’ll see one that is trained. There was an elderly gentleman named Bill in the condo complex where we used to live who had trained one. The myna would fly down off the trees and rest on Bill’s shoulder.
Of course, myna birds can be annoying when trained and released. I’ve seen mynas who have no fear of humans land on their tables of open air restaurants and take whatever food they can steal before the surprised diner reacts.