Twiba and some other Dig-Its commencing a strange ritual which focuses about surprises.
Worm surprises, commonly unofficially referred to as just surprises are events that are unexpected. The Dig-Its are notorious for giving these events, and we're not even sure how considering their lack of hands which would allow them to actually give the surprises. The outcome of a surprise can be either good or bad, but most of the time they can be bad, as the Dig-Its love giving them most of the time, and the Dig-Its enjoy doing bad things.
The Dig-Its were so notorious for giving surprises, they wrote a song about it, made to indoctrinate victims into their beliefs alongside psychedelic flashing colours and lights being displayed behind the Dig-Its' performance. In this very song, they explain how: