I am slowly working through the after hours course and am working on Lesson 3 where I find the slide from F4 to C3 (if I have that right?) difficult, both from avoiding pain and failing to make it sound good. I'm moving my hand backwards lightly with the thumbnail running along the keys, a little below the ends of the black keys. Also that movement seems to clash with what the left hand's doing. I wondered if it should be F4 to F3 but it looks from the video like it goes down to C3 before jumping up to F3 to play the next chord. Are there any tips to help improve this technique?