Press the space bar for something. LOUD SOUNDS WARNING!!!!!! Make sure you're not wearing headphones and turn down the volume, for the sake of your eardrums. DON'T WORRY, IT'S NOT GRAPHIC. Well, unless you think Silvamy can be found in gore. For those who want more interactivity: https://scratch.mit.edu/projects/129404783/ (This project got NFE'd, so it's not really that "acceptable". I may make a second version which is tame enough to be For Everyone.)
Image from DeviantArt (the artist draws rather INAPPROPRIATE art) Screams from various sources, including @WazzoTV and My Little Pony This was created for the Scratch Wiki. Hey look, a wiki on screamers (which may NOT be suitable for minors) has an article about this! "Example acceptable screamer is an Scratch animation developed by user PrincessPanda_test_ on September 18, 2016. It appears to start with a white background. When the player presses the space bar, a fan art drawing of Silver and Amy from the Sonic the Hedgehog franchise appears, along with a long, extremely loud scream." (If you're wondering why I used a piece of Silvamy fanart, it's an in-joke among my projects. It's NOT meant to offend the artist and any Silvamy shipper.)