From Yahoo! News:
A trainer was injured on Thursday, August 8 at Marineland, in Ontario, Canada, during a show featuring two beluga whales. The injured trainer, a young female, was taken to the hospital after the incident, according to the blog Everyone Hates Marineland.
The incident was also videotaped and posted on YouTube by someone named Tom Blake. In it, at around 1:45 minutes, it appears that something is not right with the female trainer and the whale she is working with. Then, instead of springing up vertically out of the water and onto the “slideout” area, as her male counterpart does, she needs to be helped from the pool by her colleague, before collapsing in what appears to be serious pain.