few days ago I found out obelix can jump above the tornado at the beginning of the stage. At the edge of the pit, there is a way to jump in the the tornado and bounce the other side to grab the key
for now the safest way is stay at the edge, way for the right moment and do a very long jump. While recording I've also found another setup where the tornado bounce at the very edge of the pit and reach the otherside
Found a good setup to get it constantly: After jump over the 2 tornados, jump over the edge and come back on the edge, the next tornados will keep falling down. from the edge you just need to slowly go left until the tornado bounce and bring you to the other side. I think ducking is better but looks like it work without it anyway.
Here is the video to illustrate that
WOAH!! This is a insane discovery man! Breaking the game even more xDD Gonna practice that and maybe try for future runs.