I've been thinking about this amusement.

1) The fact that her feet are to hit the (hard)ground seems to indicate that he would support her hands and thus ease her spring. This kind of jump seems almost within propriety.
2) But since she could even consider jumping, before he held her hands, it must be that she expects him to catch her. This to me would mean that he gathers her to him in his arms before her feet hit the ground? Then he would lower her carefully until her feet touch ground.