I don't know whether you heard this story before or not, but this is just sharing with you, all about funny Animals laugh vs Donkey's one. Read about why other says Donkey's laugh or What is Donkey's laugh? etc.
The school bus entered in a Zoo, the bus carrying around forty kids in it and of course with teachers and headmistress etc. It was for two days and a night trip from the school. It was afternoon 3pm by the time they reached the mega Zoo and it was delayed to enter the zoo due to other visiting place consumed the morning time. Anyhow, they were able to complete seeing few animals only and the zoo time got over to close it for the day. The signal given for it.
The school management staff asked Zoo management to permit to continue it the next day since the kids were unable to complete seeing, enjoy the entire species and places in the zoo.