A family which slept through a lightning strike wants to thank a stranger who knocked on the door - and 'saved their life'. <br /><br />Dad Ali Shah, 59, had a random woman bang urgently on his door in the early morning to tell him there was black smoke "billowing" out of his home in Watford, Herts.<br /><br />He was in bed and unaware of the danger in the room above his and his wife's bedroom - terrifyingly later told by fire services that the ceiling could have collapsed if they'd stayed another ten minutes. <br /><br />Thankfully, Mr Shah and his wife, 66, and daughter, 32, emerged unscathed from the house - though the property incurred damage of up to £60,000. <br /><br />Mr Shah, a technology consultant, said that though he'd heard the powerful lightning strike, he didn't think it was their home it had hit.
