Question

When will you be doing your jump? Where will you be doing your jumping?

Answer 1

"Your jump" implies a single jump, like a parachute jump for instance. "your jumping" would be a series of jumps, perhaps on a trampoline; the -ing implies continuity

Answer 2

jump = verb (i.e. push oneself off a surface and into the air by using the muscles in one's legs and feet), noun (i.e. an act of jumping from a surface by pushing upward with one's legs and feet) jumping = noun (gerund in noun position)