INFI is amazing stuff - but it is not designed like, or to be used as a prybar. You can under extreme circumstances, but if you push it you will break it. The benefit of INFI is that your knife will take more stress prying than other knives will before breaking, but it's still not a prybar. I've broken the tip off my TTKZ prying up wood from a peice of corian, OwenM broke his basic 9 prying apart pallets (albeit a lot of pallets), 430grain broke his BOSS street (a thick knife from tip to ricasso) while trying to pry open a wedged machine vice, and I'm pretty sure the game warden that snapped was from prying as well.
If you have to pry with your knife, try to get the lateral force as deep into the blade as possible, don't attempt to pry with the tip. If you have to do it, listen to the blade, watch it. If it starts to change at all, or take a set, stop, that's going to be the point at which there may be no going back if you continue to pry. If you do get your knife to take a substantial set in any portion of the blade, consider sending it in to busse combat to be stress relieved with a cryo cycle, or at the very least call them and ask about it.
At some point you should look at a prybar designed to do whatever task your looking for and compare it to your knife, you'll find that the edge at the tip of the prybar is much thicker, the shaft itself is also much thicker with no thin edges, and a rounded/hexagonal shape, and that the steel used is considerably softer. All of these things add up to a tool that is much stronger and more capable at taking lateral and shock forces (albeit with more denting at the location of shock).
