Black sphere and small objects "searching" for somethingI were outside to do some garden stuff and i look up and see a big black beam which is focusing on a grass-area, i go after the beam until i get around 80m from it and i can smell something burning, i look up and see a white light where the black sphere starts. I look at the ground again and see several objects almost searching the ground for maybe resources? They had small claw-lookalike "arms". (It looked like robots, probaly not aliens) They looked alittle like a football or something like that except of the arms they had. Nothing happened other than those "robots" and the smell of burnd grass.... It lasted around 4 min, and suddently the beam and the "robots" were gone.. I look up and now the light is blue and after around 1 min the "UFO" "flew" away with a incredible speed and high acceleration.((NUFORC Note: Date is approximate. PD))