Well Akshually.
Misconfigured MIME types on certain old web servers would display the raw data of any file.
I had an Executive who wanted to watch a Video from some “Motivational Speaker” (scam artist) on her iPad. The Scam Artist (Motivational Speaker) had it wrapped in a Flash Applet and when she contacted them about not being able to watch the video, he started soap boxing about how terrible iPhones and iPads were and that Apple is Doomed.
I checked the website and found that the MP4 file had the MIME type Octet/Stream instead of Video/MPEG4 and I created a dummy xHTML page with the appropriate tags.
The video worked perfectly on her iPad and her husband went on to watch the video, believed the “Motivational Speaker” and was fleeced for thousands of dollars.




Penny Arcade did it best with the Magic Hate Ball.
https://art.penny-arcade.com/photos/215099323_Noxws-L-2.jpg
https://www.penny-arcade.com/comic/2001/08/13/how-indeed