Of course, this is a gazillion balloons, but the ribbons are hanging down. The other pic shows the balloons themselves hanging upside down. They would have to have a glass bead inside to do that - the kind that you put in a vase.
Awesome idea:birthday party decor,take diffrent color table cloths and tape them to to ceiling like that. Then tie 3 diffrent color balloons together and tape them to another set of balloons then tape the all the balloons in the middle of the table cloth.