Sunbathing.. heard a strange noise.. thought it was a plane at first, but then spotted it.. made a strange pulsating noise somewhat like a propellor but then with a sinus wave... quickly had someone grab camera to film it, but it was relatively far away by then.. film included here: https://www.Youtube.Com/watch?V=vlgjuwwgkbk it was a triangular shaped object with rounded edges.. it moved over our heads in a straight line from "dieren" to "nijmegen" roughly.. made a call to the police after noticing the object.. since i haven't heard of them still, here is my report.. time of event is unsure.. perhaps can be deduced from video..