NE MRT Breakdown or was it an Exercise?

On sat morning at 8.45am.. i left my home to take the LRT to Sengkang Station then transfer to the NorthEast line MRT to Chinatown MRT.. When i arrive at the Sengkang MRT station, a train just left.. Well since it is the so call one of the world’s first fully automatic underground heavy rail systems. So better don't take the risk of rushing into the train while the door is closing.. So i wait for the next train, while i play with my PSP.. Then the train arrive... I board.. then came the announcement that this train will halt for a few mins.. Well these are quite common during peak hour... So everyone sit patiently, after 10 mins later then train start to moved toward Buangkok Station.. Once arrive at Buangkok station, same announcement was mad.. and was halt for about 15 mins.. Then it continue it's journey to Hougang Station,. and again the same announcement.. after 10 mins of halting at Hougang Station.. another announcement was made for all passengers to alight and wait for the next train... By then it was already 9.40pm.. i don;t have time to wait for the next train as i'm working at 10am.. So i got out of the station and try to get cab.. and to my surprise the taxi stand was full of stranded passengers and everyone was calling for cab.. so no choice.. I called my colleague to inform that i'm stranded due to MRT failure and took bus 147 to work..

On the way, at one of the bus stop at Serangoon MRT, i could see huge crowd.. waiting for bus and cab.. and many people try to squeeze into the bus.. Then another stop at the bus stop at Potong Pasir Station, i saw ambulance and fire engine from SCDF.. Many SCDF personals were rushing in and out of the station.. and the bus stop was crowded with stranded passengers.. OOh my this time i was really late for work... I reach my work place at 11am... Ooooh my, i was suspecting sometime is happening at Potong Pasir MRT, either the train breakdown or what...

Then in the evening, the news report that SCDF is holding an emergency exercise at MRT stations along the to be open circle line.. Till now i don't know is it because the train breakdown or fire at Potong Pasir station or because of the Emergency Exercise by the SCDF... But the SCDF Emergency Exercise is at the to be open Circle line.. Not NorthEast Line...

SBS Transit should make it very very clear to the public.. Is it a breakdown or a real exercise...??