XXX is
No, it is much easier:
You stand in front of the mirror and lower your head. You count for 10 seconds, and then you sharply lift your head and crack out with all your strength! And so abruptly you lower her, silent.
Repeat the procedure several times if necessary. Usually 2-3 is enough. :)

YYYY
I tried, only confused the mirror with the window, the child from the house in front of me.
The mood has risen.)