Why do you put the bottle sideways?

The performer took out his handkerchief, wiped the sweat on his face several times, and then showed it to the public before and after, indicating that there was nothing in the handkerchief. Spread the handkerchief on the stage and bring a wine bottle to the public. There's nothing under it. It's on the stage. The bottle is standing. At this point, the performer blows air at the bottom of the bottle, then puts it on the handkerchief, and the bottle stands obliquely on the handkerchief. Pick up the bottle and breathe again. Then put the bottle on the handkerchief. The bottle was more inclined than last time and didn't fall down.

Before the performance, sew a match or a square stick slightly larger than the match on one side of the handkerchief. When raising a handkerchief in public, the audience holds a matchstick in their hands and can't see anything inside the handkerchief. When the handkerchief is placed on the table, one end sewn with a matchstick is placed on the edge of the table. When you put the bottle for the first time, the bottom of the bottle will lean slightly against the match and the bottle will tilt slightly. When placing the bottle for the second time, put the center of the bottom of the bottle on the match, and the bottle will be more inclined.