The document summarizes three case studies of brands experiencing social media crises:
1) Women calling themselves "Taxotears" blogged and commented about sanofi aventis' cancer drug Taxotere, claiming it caused permanent hair loss without adequate warning from the company.
2) Motrin launched a viral video ad that mothers found offensive and said would prevent them from buying Motrin in the future. The company took down the video and issued an apology.
3) When US Airways Flight 1549 crashed into the Hudson River in 2009, photos and information appeared on social media within 10 minutes while the airline was slow to communicate through its own channels.