ok here's one...

ok so... button on a string, take that idea... when you have it moving, snap the center so the string is no longer attached, then move all the weight to the center
obviously not practical in a gravity field....
(two rockets... pointed so the flames dont burn the string... both pull a pre-wound string so the spacestation starts moving... then they cut the string....?)

for fun, 1 foot wide round piece of plywood, two razor blades set up where bicycle forks end... set your dick carefully to spinning fast then when the top of the spin is rolling away from you "chop" the string downwards on to the rope so the plywood disk is set loose at speed... please do not point at humans!