Explain xkcd: It's 'cause you're dumb.
Interesting (or deliberate?) that there's no reference at all in the explanation to Sunshine, released two years previously. 18.104.22.168 21:07, 20 May 2013 (UTC)
Can't "to spring" be thought of as a physical movement? 22.214.171.124 00:49, 7 January 2014 (UTC)
- Yes; that's why the mnemonic works. Zowayix (talk) 16:08, 15 January 2014 (UTC)
- Also, the mnemonic works because physically it is relatively easier to spring (i.e., jump) forward and to fall (through the simple action of gravity, without being able to catch yourself with your arms) back(ward) than it is to do the reverse. --BD (talk) 01:09, 20 November 2014 (UTC)