>> every 15 seconds, yes. >> larry: emile hirsch, why did you do this? i boarded the mission last minute. so i had to kind of cram in the training. but it was a chance that -- to do something that i thought was really exciting, you know, combining something that was, you know, exciting for people to watch. and to follow, climb mt. kilimanjaro, but at the same time a chance to educate people about issues that are really important like water. i'd been to congo and zimbabwe, and had an education background on the subject of water and i knew how important it was and immediately signed on board. it was daunting, though, 19,340 feet is, you know -- the altitude can kind of get to you. i think we were both hallucinating at one point even. you get a little funny in the head. >> larry: did you get to the top? >> yeah, 45 people out of the 45 brought, we all got to the top. >> it was the largest group. >> larry: this wasn't easy for jessica. let's take a look at her on mt. kilimanjaro. >> kind of going in and out a little bit, you know? nauseous. stomach upset. >>