Communion

When Christians take communion, why are they usually so solemn about it? Sometimes solemn doesn't cover it - it's mournful! Isn't communion a kind of celebration and worship of a really good thing? Shouldn't Christians generally be happy and excited when taking it? People look like they think it's the worst thing in the world that Jesus died. Of course, in a way, it was tragic. But think about what it accomplished and show some joyful gratitude, please!