That is exactly the difference between weight and mass. And yes, that would be weightless and objects like balloons have negative weight until they reach an altitude where they’re neutrally bouyant and then are weightless.
https://en.m.wikipedia.org/wiki/Weight
Weight is defined as a force and has a direction. That’s what causes the movement. If the weight didn’t change there would be no movement.
This is Iran. The mini-bombs were in Lebanon.
This is the third group of people Israel is trying to kill in their apparent attempt to start World War III