Nope.
Would require either the player becomes a vehicle, or tilting the player, which is impossible without a vehicle.
Would be really complicated to do, gravity player.
I am working on a solution to this.
done so far:
-Event to invert Player by mounting it to a bot with the mountpoint upside down
-3rd person camera veiw corrected for being upside down
-walking on the ceiling: not check... sliding on the ceiling: check XD (I'm working on it and can probably fix it easily when I get a chance
TODO:
-pass the animations from the bot to the player
-keep the player from sliding
For anyone veiwing this post that knows how to pass on the animations post here:
http://forum.blockland.us/index.php?topic=194961.0