That is correct! The second part has 2 such checkpoints at the end of the snake segment, and on top when you grab the Swingman. The fourth part has one at the bottom of the level, after the long drop.
Scoreboard
PluMGMK: 6 points
Hunchman801: 4 points
The Jonster: 3 points + Bonus
hoodlumsworld: 1 point
Elite Piranha: 1 point
lumgum: 1 point
Fifo: 1 point
CurlyBrace: 1 point
PluMGMK got 2 straight points and should skip this question.
Question 19: Where in Rayman 3 can you find a Hoodoo protecting another Hoodoo? Please be as specific as possible.