When there are two Sifrei Torah taken out on a particular Shabbas, the tradition in many shuls is to have the second safer Torah be held by by one of the congregants sitting down while the first one is being read.
It is also true that many hold that there is a obligation to stand for at least part of the Torah Reading.
From what I have seen in most congregations the man who is holding the second safer torah does not stand for any part of the first safer torah being read. Does anyone have a source for why that is?