We had gone trekking to Langtang Valley to the North of Kathmandu and had just climbed some 3500 metres up to the top of the Nagthali mountain. It had been a steep climb uphill through the cliffs, we were tired, had just found a place for ourselves to stay in and were about to have a cup of tea when the earthquake struck. It was so strong that we felt like we would slide off the mountain any minute. It was later that the villagers told us that even though we were swung around badly it is the safest to be on top of the mountain during an earthquake. The destruction is the worst below due to landslides.
Incidentally, Nagthali was close to the epicentre of the first earthquake and was the actual epicentre of the second.