I had an idea for a messy sketch. It's probably been done before but here it is:

The set up is two or more people are hanging out and one of them gets messy. They're hit with pies, slime, etc.

But neither the person getting messy or who they're with ever acknowledge it, no matter what happens.

Alternatively both get messy but never mention or react to it.

It's likely been done before but that's the idea.

A recent Moomin vid where Charlotte messes up Casey and Jess is similar.

Albeit they get revenge at the end.