Bucher silly string

In the AG race, Paul Bucher gave his speech before JB Van Hollen.

Interestingly, after JB Van Hollen's speech was over and everyone was applauding, two Bucher supporters - a boy around 11 years old and a girl who looked to be in high school - ran back and forth in the back squirting silly string on everyone. They then went up to an older Bucher guy (not sure of his official role) to confirm that everything went as planned with the silly string.

I'm not sure if they were trying to make it look like it was Van Hollen's campaign, since silly string is really annoying, or if they were trying to rain on Van Hollen's parade, or what.

Very strange.