Not trying to scare you guys that have pro days coming up, but you might want to take heed to what scouts are saying after Orson Charles' pro day Monday at University of Georgia.
Bottom line, especially for guys that didn't go to the Combine, and were already fringe-level guys at best, you'd better show up ready to perform.
Here's a post on what to expect at your pro day.
This post gives you insight on how scouts will look at your results.
This post tells you the numbers you should be shooting for in each of the drills.
Here's part one on a series I did on mental preparation techniques you can use to get your mind right in the hours leading up to your pro day (part two will be dropping sometime over the next week).