He works as waiter? I've seen it done in restaurants before, quite stylish smooth and makes it look like so easy.
It's not that difficult actually. I open a bottle fortnightly (not everyday like the waiter) and I am skillful already .
Supermarkets collect "everyday" wines, they are worthless to taste, just treat them like fruit juice with your casual meal.
If you have the interest to enter the world of wines, at least get your first bottle from the wine shop.
I am obviously not an expert, neither am I a newbie, yet I still have lots to learn. I wish to acheive my wine collection that range 1k and above in my wine cabinet. The best wine that I have tasted is 2001 Chateau Margaux and my daily wine is Chateau Giscours 1990~2005.
Simple but always been forgotten - Let your wine breathe before your drink. (20-30min) or (30-1hour).