KyleBPedley — 14 years ago(August 04, 2011 07:35 PM)
I never got the impression that this is something the critters can actively and deliberately do - more it was a result of them being 'blown' together in the explosion
jeff-1076 — 13 years ago(October 28, 2012 08:34 PM)
It's foreshadowed earlier in the 2nd movie, four of them are seen to roll together while inside the burger joint and near the end of that sequence the large ball is shown to run into a post and split back into four separate Critters.