Medics are on standby on the set of the TWILIGHT movies, to help fans overcome by the sight of their idols.
The vampire franchise has whipped teenagers into a frenzy, particularly over hunky stars Robert Pattinson and Taylor Lautner.
And Lautner admits some devotees can't control their emotions.
He tells Interview magazine, "We've met many different fans: the criers, who come around quite often; the hyperventilators, who stop breathing and have to have a medic come. We've definitely seen some passion."