go to http://www.amazingfacts.org/ and search "life after death". it would be a good exercise for all who are curious about the teaching of scripture to do their own research. personally i believe scripture to be the true word of God and with regards to those testifying to their experience of life after death is inexplicable and may well be the work of the adversary.
Well it would surprise you that God does give us visions and that does include visions of Heaven.
DIYBI
Translation: “Do it yourself Bible interpitation”.