Possible Blimp?I first saw an object moving slowly with the wind south of Amstelveen-Amsterdam,Netherlands. At first I thought it was a small-medium sized blimp as it appeared to be the same shape and made little, if no noise at all.It appeared as though it was faintly illuminated internally with slowly pulsating electric blue lights, similar to lights used on emergency vehichles. The blimp then slowly halted and remained stationary for 30-40 seconds.Then in awe I observed the blimp roll on its side and slowly 'peel off' over school/college/office buildings. I beleive that at this point the blimp climbed at 15-20m/s perfectly vertically and disappeared into the cloud covered sky.I had drunk two pints of lager, but I believe that what I saw was not imaginary. I was within 400 meters of the blimp and although I was in a poorly lit street, the internal illumination made it look just like a blimp with a thin non-metal skin.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))