So I put Andrew in middle of the floor and watched him to see if he would do it again. Placed him on his back and he immediately rolled over onto his stomach. It appears he likes being on his stomach. Since he rolled so easily I thought I might luck out and get a video; it may not be the first time he's done it but at least it's the same day.
This is the result. Apologies in advance for the talking: it appears I sound weird when talking to my baby.
Yea; he got some help from his sneeze that time but he's been able to do it without several times now. :)