During lunchtime you can go out to eat something, what I thought most of us will do, or you have plenty opportunities to fill the high-noon-break, what I learned while walking in the sun to get some fresh air outside the office building.
Take a look for yourself how manifold people spend time during their lunch break:
# w o r k i n g
# r u n n i n g
# t h i n k i n g
# t a k e a n a p
# d r i v i n g
# r e a d i n g
# s m o k i n g
# s l e e p i n g
# l i s t e n i n g