Here's the issue: no one knows where case 8.3.3 came from. Two people I know on the rules committee dont know where it came from. SOMEONE in the FED office in Indinapolis wrote this play (it's new this year), and yet there doesn't appear to be any rules support for it. There was no rule change this year that would have suddenly made this valid.
So yes, there is a case play that supports it. But the Rules Committee doesn't support it. On the infinitesimal chance you have a safety by A on a try, feel free to rule however you want, and there is support for your side.
When it happens, send video, because in the mean time, I'm still in the "It'll never happen" camp.