Y'all are SICK. *smacks the lot of you!*
It was the French Team who first introduced the concept of the lighter than air spars for two line kites.
I forget the name of the team but remember vividly one of the fliers turning up at the FIAC event in the Grande Palais in Paris one year.
Now there is a serious space for indoor (spar assisted or otherwise) flying.
Not so good with mobile phones as it is a steel structure.... da da da da da da ....