[Monkeydad]

Percy Harvin collapsed during Thursday's practice and was taken to the hospital in an ambulance.

Coach Brad Childress said that Harvin had an "episode" and not really a "seizure." It was apparently triggered when Harvin looked at the sky on a punt return and is almost certainly related to his migraine woes. Harvin was trembling and partially responsive as medical personnel got him off the field.
Source: Tom Pelissero on Twitter