Well I had a dream where I spoke briefly with the Buddha and observed him in action. Now if that doesn't seem like a mind-blowing, Dhamma-shattering occurance (that was just a dream, we might suppose, anything can happen in a dream), why should it be so outrageous that Ajahn Mun had a conversation with the Buddha in a meditative state of some sort? We might say "well that's just the imaginings of one's own mind then, that's all... " or we might think there is a bit more to it than that. Either way, there's the question of whether it imparted something valuable that you did not know before.
"When one thing is practiced & pursued, ignorance is abandoned, clear knowing arises, the conceit 'I am' is abandoned, latent tendencies are uprooted, fetters are abandoned. Which one thing? Mindfulness immersed in the body." -AN 1.230