How to correctly saber a champagne bottle

After dabbling with it quickly in class, I spent some time doing additional research on how to saber a pressurized wine bottle (champagne, etc.) correctly -- and with limited injuries by the participants! Here's what I've learned:

• Get a wine bottle of choice and the object that you'd like to use to saber it. A kitchen knife works well (since you likely don't have a sword available)
• Point the bottle away from everyone
• There is a seam on the bottle that runs the length of the bottle (vertically)
• You want to strike the bottle right at the intersection of the lip and the seam (very close to the top of the bottle)
• The goal is to have the cork and a portion of the glass bottle fly off so please please don't point it at anyone
• Amaze your friends and family

Tips:

• American champagne bottles are harder to saber than French bottles
• The bottle should be VERY cold. 
• Your knife doesn't have to be sharp. You can do this with a kitchen knife
• There is a lot of force from the Champagne pushing against the cork at all times and you're pretty much capitalizing on that force to break the bottle at it's weakest point

Sources: 

https://www.wired.com/2015/12/how-to-saber-champagne/

https://www.chefsteps.com/activities/how-to-saber-a-champagne-bottle-with-writer-neal-stephenson