Pretty sure this is unposted as of yet.. I have searched every thread with the word "Shadowmeld" in it and I have yet to find this explioit. So let's get to it.
Use this macro instead of the ability button....
ProfitCode:/cast Shadowmeld /sit
Here's a video in case you're too skeptical...
[ythd]f1k-wdP8pYU[/ythd]