Mark-to-market accounting can become volatile if market prices fluctuate greatly or change unpredictably. Drugs are smuggled into Bristol Prison leading to prisoners behaving unpredictably and being sometimes violent. Events unfold as unpredictably as life itself. Tempos and dynamics change rapidly and unpredictably in order to reflect strong changes of emotion. Events which appear trivial initially cascade and multiply unpredictably, creating a much larger catastrophic event. These microalgae are not associated with sewage but occur unpredictably as algal blooms. Although infrequent, bronchospasm has been reported to occur unpredictably in some patients. The weather of Tehran can sometimes be unpredictably harsh. Also, particle tracking is more sensitive to noise, which can sometimes affect the results unpredictably. Hand grenades rarely detonated or detonated unpredictably. During the course of the fighting, alliances shifted rapidly and unpredictably. Bligh had visited the island with Cook, and knew that the inhabitants could behave unpredictably. There were often many parties represented and the alliances and factions changed quickly and unpredictably. Acquisitions such as the FCS rely on a web of interrelated parts which interact unpredictably. Some applications developed in Clipper 5.0 crashed frequently and unpredictably.