The travel velocity of these two wave types is not the same (P-waves are faster than S-waves). Thus, if there is an earthquake somewhere, the first waves that arrive are P-waves. In essence, the gap in P-wave and S-wave arrival gives a first estimate of the distance to the earthquake.
With the mysterious U.S. Senator Eddie Morra (Bradley Cooper) providing him with a second drug to counteract NZT's deadly side effects, Brian uses his enhanced abilities to help FBI agent Rebecca Harris (Jennifer Carpenter).
Voice cast. 1  Danny DeVito as the Lorax. 2  Ed Helms as the Once-ler. 3  Zac Efron as Theodore Ted Wiggins, an idealistic 12-year-old boy. 4  Taylor Swift as Audrey, Ted's love interest. 5  Betty White as Grammy Norma, Ted's wise-cracking grandmother.