Blunt stalls....ah, I'd consider this the trick that takes a beginner miniramp skater to the intermediate level.
First off, if you're not comfortable doing rock fakies, and dropping in switch, then don't bother with this trick. You'll get a hipper or break a rib.
Once you are very comfortable with rock fakies, (full extension over the coping, back wheels touching the coping) you should start trying blunt variations.
~To begin, you want to pick a nice, smaller sized ramp, with a mellow transition. I learned on a 3 foot miniramp, with about a 60 degree transition.