Forgetting your lines is one thing (but with your own national anthem...... anyway)
Not being able to get out of the situation and not being able to recover yourself is a whole different story.
A real musician has to handle these situations. I mean, how many of you can claim 100% faultles gigs anytime? (I certainly can't )The art is to get on, not letting the audience know there was a hickup in the first place. Chances are they'll never know anyway

Giving up like the girl in the vid did is simply not an option!