Why don't trampolines work 3/4ths of the year?... drugs exercising numbers sports spring Please Rate Vote 1 Vote 2 Vote 3 Vote 4 Vote 5 Today's featured daily humor:Why don't trampolines work 3/4ths of the year? They only work in spring season.Click for another laugh! Previous article: Why was Superman unable to catch the grave-robbers gang?... Prev Next article: What do you call a smart cheese?... Next