Napoleon did it to celebrate victories. You can do it to celebrate your own victories. Here's how -
*Note - Let's use common sense here gents. This site nor myself will be liable for your folly's!
You'll need. One Bottle of champagne. One sword, machete or even survival knife.
Hold bottle near the bottom on the underside with one hand. Have the seam of the bottle pointed upwards. With your other hand hold your blade sharp side away from the top of the bottle. You're going to strike with the back of the blade NOT the sharp edge. Point bottle away from you. Slide the flat of the blade along the seam of the bottle until it hits the neck and pops it off. The neck of the bottle is attached, welder if you will to the rest of the bottle. It will pop right off. You''ll need to do this with some force but not perhaps as much as one would think. The force of the champagne forces the glass out but check for glass when you pour.