Megastar Amitabh Bachchan was surprised to see the media parked outside his house after he tweeted about his impending CT scan.

He is likely to undergo a CT-scan at the SevenHills Hospital, Andheri East, where he had been operated almost two months ago.

"Oh dear..up at 6 am to go for dub of Bhojpuri film for my make up man..and..a fleet of media vans and tv camera chasing me? Why?" Amitabh tweeted.

"Security asks media crew reason for chase, they refer to my Twitter on CT Scan..goodness! Is that what power of twitter really is?" he added.

The actor clarifies that it was about a regular visit to the doctor.

"Dearest TV media and vans outside my home, please do not stress and work so hard. Its nothing, just another visit to my doctor!!"

After this, the 69-year-old feels that he has to be more cautious while sharing information on social networking sites.

"Got to be careful of what to write on Twitter and Blog... screenplay writers abound!!"