The three brothers have finally been thrown out of their apartment. With nowhere else to go, the three go to the park. While there, they overhear a mother reading "The Three Little Pigs" to her child, and the three brothers attempt to recreate the house-building techniques from the book...
So it might be rolling 
around here somewhere.
Entonces debió rodar a algún lado.
Entonces tuvo que rodar a algún lado.
Então a bomba deve estar rolando por aí.