2 women are frightened by a very loud low flying object, while in their hotel room, watching a lightening storm.8-2-15: Two women ((initials deleted/40's/female #1) and ((initials deleted/50's/female #2)) were sitting in their hotel room ((room # deleted)) at the Marriott Residence Inn on Gateway Drive in Reno, NV. We were watching a large lightning show that had gone on for over 1 hour. It was very intense, but though there was enormous amounts of lightning; we heard no thunder.At about 1:30 am, our 1st floor room began to shake…we both thought earthquake! Then we heard a very loud noise like a giant vacuum going very slowly overhead! We could feel a large amount of energy that made all ((deleted--2nd woman's)) hair stand on end and cause ((deleted--1st woman)) to be nauseous.We looked at each other with wide eyes, and both said simultaneously, “What the hell is that?” Then a very bright white light appeared outside the window. The light seemed very low…barely clearing the top of the 2 story hotel. It was angled down toward the ground. We thought it was finished going over, but then a second round of the very loud bass sound began crossing the ceiling. We determined that there were either 2 objects or on very large object with 2 engines. There was no light accompanying the second sound.Things that were hanging in the room were swaying.((female #2)) ran outside to see what it was but because of the trees and height of the surrounding hotels was unable to see anything but the light moving very slowly. She heard what she could only describe as loud mechanical wailing.We waiting to see if we would hear anything else….like the freeway or maybe airplanes. We did hear those things but it was NOTHING like the fly by experience. We were freaked out by it.((female #2)) began frantically texting her husband, who told her to call 911 if anything else happened. No other strange happenings occurred, so she did not call.The sound was like nothing either had ever experienced before. ((femal #2)) grew up next to an international airport and is very familiar with the sounds of helicopters, and even fighter jets. This was neither of those things. Both women were convinced that it was an aircraft unlike any they knew of.They were shocked. ((female #1's))((deleted--teen relative) slept through the whole experience.We could find no reason why a helicopter or plane would fly that slow and low over hotels. We considered that there is an Emergency Room at the Renown Hospital nearby, but this craft did not fit any of our understanding of a typical helicopter. It was moving extremely slow, and had a constant bass humming sound...no chopper sound at all.There were dogs in this hotel and they were all barking.((female #2's)) ears were ringing very loudly from the intense sound. This lasted until she fell asleep several hours later.Neither of these two women have ever experienced anything like this before and both were trying hard to figure out what it could be...in the end, both agree it was either a secret military craft or a UFO