How Do U Tie A Knot In A Balloon Does Anyone Have Difficulties In Tieing Knots In Blown Up Balloons?

Does anyone have difficulties in tieing knots in blown up balloons? - how do u tie a knot in a balloon

A working group evaluation was to create a balloon structure. I can not for the life of my tie balloons. It can not be the only one who can do it! Do you know someone who can not?