I did too this morning. It may be, but when developing and perfecting the big jump here took me literally thousands of tries before I even landed it without crashing immediately. Testing this trick (jumping from the 3rd to the 4th hill) would take longer because you can only try it when you land on the 3rd hill just right, so the number of opportunities to test it out are much less.
I believe it may be possible but very difficult... I got closer this morning too. I'll post it later to compare