GIF: Big Papi conducts pseudo concussion test after hitting Alex Avila with backswing

After knocking Alex Avila down with an errant backswing, Boston Red Sox slugger David Ortiz took it upon himself to test the Detroit Tigers catcher for a possible concussion. 

[Courtesy NESN]

Unfortunately, Avila failed to pass the testing conducted by his real medical staff and was replaced by his backup, Bryan Holaday. 

Ortiz kinda feels bad - now.