When inside the yalmaha (ie. equipped) and you do ALT+F4 twice and then log back into the game you will appear for evryone else as you where in the size of 20% (as the yalm sizes you to) and flying like quantum wings. even if they zoned inn AFTER you came back online.
on your screen it will look like you are inside the yalm (evrythings normal).
It will go away if you zone or exit the yalm and re-enter it.
EDIT:
Only tested with reg yalm unpainted.