Husband was twitching in sleep it woke him up it was that bad is it something serious?

Probably not serious: But, he could possess a sleep disorder called paroxysmal limb movements in sleep (aka, nocturnal myoclonus). Rarely, epileptic seizures occur only at night, but your description is unlikely to represent such a problem. Easiest way to sort out involves visit to a sleep specialist, with a sleep study and eeg. Treatment is usually very successful.