Do you think these "dance" useful to real combat?

[alvalong]

Wang xuanjie demo how to defeat with Dachengquan.
What make me surprise is that many ppl think it is total unuseful to real combat, you end dead,if use it in street fighting,
what do you think about it?

[shaolin-warrior]

Although Wang xuanjie looked like dance to you and the executioner of these drills or demos looked like a doddering old man, these same techniques could be very useful in a fight, I don't know what you consider real combat, but these moves done faster, and harder could be pretty good Kempo like techniques.