You’re crazy. He prevented the #1 War of Will and the #18 Long Range Toddy from position in the stretch. I actually believe the #1 horse might’ve won the race.
https://www.msn.com/en-us/sports/motorsports/maximum-security-wins-2019-kentucky-derby/vi-AAATXrf
It starts at 1:54 half way around the corner with #1 making the move to get off the rail by bumping #18 out of position. Right after that, MS swerves out 4 lanes and back 3 lanes at the end of the corner. Country House stayed out of the mess. The guy in green moved up along the rail and benefitted from it all.