Craigslist - Submitting posts too fast displays a message that “Craig can’t type them in this fast.”

Craigslist - Submitting posts too fast displays a message that “Craig can’t type them in this fast.”

4 Mar 60short url
Twitter - When submitting the same tweet twice, an error message is shown. /via Sindre Sorhus

Twitter - When submitting the same tweet twice, an error message is shown.

/via Sindre Sorhus

18 Sep 15short url
Facebook - When you click multiple Add Friend buttons too fast, Facebook shows a warning. /via alfieindesigns

Facebook - When you click multiple Add Friend buttons too fast, Facebook shows a warning.

/via alfieindesigns

13 Aug 31short url
Gmail - Spam inbox displays Spam based recipes above the message box. /via Brad Graham

Gmail - Spam inbox displays Spam based recipes above the message box.

/via Brad Graham

15 Oct 48short url
Akismet - Moving a slider between $0 and $10/month dynamically updates a little smiley face. /via dhs

Akismet - Moving a slider between $0 and $10/month dynamically updates a little smiley face.

/via dhs

27 May 27short url