clayton, lake maine, 18 below. how cold on it? sa viewer in minnesota tweeted this home video. scott is outside with a normal cup of water and he s about to throw it in the air. it is so cold outside, that the cup of water instantly froze. reporter: scary on the roads, too, in pennsylvania friday. several trucks lost control on the ice and crashed. only minor injuries here. but in st. louis, one man died when a pickup truck skidded on the ice and knocked him off the overpass. from duluth to omaha, des moines to boston, the dangers are melting this weekend. small banks everywhere, and it s kind of hard to get your way around. all this on top of all the snow, already five big storms in the northeast since december. new york, boston and hartford have had more snow than they