Stunts are easy

1) Removing pipes being in ice cold water .

Mostly contestants were not lying down as they had the option of squeezing their body up unlike the place where ice is continuously falling on your head in a box.

 2)  Tear gas in a phone booth 

Last time , the contestants were left at their own mercy but this time they were given a simple task of opening 2 locks and dialing a number.

 3) Going down in a chopper , taking selfie and jumping

This also wasn't very tough. In yesteryear seasons there were more tough stunts done in choppers.

 4) putting the sockets with pigeons flying. But they wouldn't disturb much if contestants do their work quietly.

 5) treasure hunt 

I found this stunt also to be simple. The contestants did not have to toil much as they were able to spot the keys easily. Only that little tunnel was a bit difficult otherwise it was easy.