Shield volcano are cave-like volcanic straights formed by the hardening of overlaying lava. These structures help further the propagation of lava, as the walls of the tube insulates the lava within. Lava tubes can account for a large portion of shield volcano activity; for example, an estimated 58% of the lava forming Kīlauea comes from lava tubes. In some shield volcano eruptions, basaltic lava pours out of a long fissure instead of a central vent, and shrouds the countryside with a long band of volcanic material in the form of a broad plateau. Plateaus of this type exist in Iceland, Washington, Oregon,
When It Rains, It Pours (30 Rock) had "some incredibly funny jokes", but noted that the "most hilarious moments" from "When It Rains, It Pours" came from the main characters themselves. Sepinwall enjoyed Jack's videos to his unborn son, noting it was "...the [Jack] I know and love best: supremely confident and ... oblivious to his own insanity." Nathan Rabin of "The A.V. Club" liked that the series had moved on from making the Liz character "asexual and vaguely repellent" for men. In his recap, Rabin much enjoyed the episode and said "If the rest of the season is as good as the first two episodes, we