Here "mindful" refers to consciously giving some awareness to the experience in hand, irrespectively of how this is brought about: it could be meditative practice at home, a few deep breaths during a meeting, a free dive in the ocean, or spontaneously with no particular instigation.
A mindful experience can have particular qualities that often go unnoticed in the hustle of everyday life. A mundane occurrence could be experienced in technicolour, or perhaps one may "catch" themselves reacting to a situation, leading to a wiser choice.
My name is John, I live in the UK and find such accounts fascinating and often nourishing, hence the creation of Mindful Experiences Blog.