I know NPNT becoz I was quite far away and got TP watching, I cannot be inconsiderate. Pass by around 8pm 
  
Saw a what seems like a chemical truck over the railing of the very sharp bend of AYE Clementi Ave 6 exit (towards Tuas). I was entering AYE in the opposite entrance. Only had a few glances. The big truck was topple over the railing  mid-way around the sharp bend. My wife spotted a couple of ambulance. Saw rescue workers running around. 
  
AYE as usual tail back to NUH with almost standstill traffic.