@Loh Jane,
In the stadium are there many people. The stadium I go to twice a week.
While these two don't use the normal word order, they are completely and unequivocally acceptable, Jane, for certain registers. You'll never see them in the "academic writing" register or the "newspaper" register but they are certainly possible in speech and in the fiction/nonfiction register.
Quote:and can I use 'sharper' to describe a memory?
Probably. You should give an example when you ask these questions. It makes it easier to give you accurate info.