Ordinarily, when you put an invalid content location in a field such as SoundId or TextureId, it opens this dialog window:
However, this dialog does not sanitize the input from the property, meaning that if you put in something like this:
You end up with something like this:
All the standard HTML tags work, such as links (and yes, it opens when you click it):
Happily enough, the script tag doesn’t appear to work and images end up looking like this when embedded, so there’s no real issue involved. It’s just a silly little parlor trick.
You can totally use in-line styles, though, so you can make things very big and colorful:
I can also see the danger if you use this method in Free models. How about a link to an offsite website for example ? The people that actually use free models will click it for sure…