What'd be funny is to take a bunch of teens who have never attended a church service and have them sit through the different denominations' services to get their reaction.
The only thing funnier than witnessing a Catholic mass while having no idea of what it's like beforehand is the idea that some people still fervently argue for the masses to be exclusively in Latin. Because if there's one thing better than medieval LARPing, it's medieval LARPing in a dead language.