this before. >> darla starts recording the approaching tide of ice with her camera phone. >> pushing forward. this is crazy. look at this. it sounds like a train. it kept going sh, sh, sh, sh. just kept breaking as it was moving. then more would push, then more would break. it was cool. it looked like these big, diamond crystals. >> but then things take a dangerous turn. >> it was bringing up rocks and boulders and tearing out all the brushes and the hedges. >> oh, my god! nikki -- look. the wall was ice was about 12 town homes wide. it just came in one big section. that's when i started thinking this thing might not stop, and it can cause a lot of damage. >> the ice tide hits one of the