what do i do if i see someone having a seizure

Check the person for injuries.
If you could not turn the person onto her side during the seizure, do so when the seizure has ended and the person is calm.

If the person is having trouble breathing, use your finger to gently clear her mouth of any saliva or vomit. If this does not work, call for emergency help.
Loosen tight clothing around the person’s neck and waist.

Provide a safe area where the person can rest.
Do not give the person anything to eat or drink until she is fully conscious and aware of her surroundings.
Stay with the person until she is awake and any confusion wears off. Most people feel sleepy or confused after a seizure.