One thing I noticed when praying in Iran is that many people perform an extra sujud (prostration) directly after the (Shia-style) taslim. It didn't seem obligatory as not everyone did it, but it seemed common practice. It looks like this is a prostration of thanksgiving (ref.) which I had not encountered before going to Iran.
I would like to know precisely how this is performed in case I decide to do this too.
Question: How is the Shia prostration of thanksgiving performed?
There appears to be differences, e.g., one does not perform the other parts of the rakat, but go straight into sujud from the sitting position.