Using second mortgage for down payment

[Nick Mcroberts]

Hey everyone! So please forgive me I’m a newb but was wondering if it’s possible to use a second mortgage to pay for the down payment of the first? Assuming that there’s built in equity off course. I thought I heard in a BP podcast (can’t remember the episode), but someone used a second position to put down on the first. Is this possible or did I dream up this podcast?