Not exactly funny, but weird.
This happened in Mexico City a few days ago. Doctors were transporting a human heart for a transplant. From Guanajuato (a state) to Mexico City. Everything went well until the last minute when they were running and the heart falls out!
The heart was well packed and the transplant went OK. Patient is also ok today.
The video is from the news. Sorry it is in Spanish.
Corazón a punto de ser trasplantado se cae en el camino - YouTube