7 trades in the last half hour that were for exactly 2500 shares. There were a few more that added up to 2500 shares, but not counting those.

2500 is not a number we see often as the share count for a trade. What an odd, odd coincidence that there would be so many, just in that last half hour.

Edit: actually I realized that there were so few trades today, those 7 trades were from 10:23 to the close. Nevertheless we hardly ever see 2500 share trades, not like this.