A confusing section indeed.
I'm not a very advanced pianist, but I have played this piece dozens of times, and here's what my piano teacher taught me (I was bewildered too).
Okay, so at the beginning of that funny section, you bounce from the lowest E to the one an octave above it - do this with your left hand. It's on the bass clef, but take over with your right hand, and hit the E just above middle C. As you can see, you hit that key twice - just try not to make it sound like you're bouncing on it. Go from that E to the one above it with your right hand, then reach over and do the same thing with your right hand. Make sense?
While your left hand is reaching over for those two Es, you're reaching your right hand over to get those next two, ending on the highest E.
So that's: Left hand - two Es; right hand - two Es, total of three times; left hand - two Es; right hand - two Es. Got it?
Why do you do that? Because Beethoven said so.
And the next part - not as complicated. Your hands are a little cramped for space, but yes, you're going to do that with left-right-left-right, because it gives it a unique, stumbling sound that smoothes back into the main theme.
Try it.
