Walking on the moon.
The summit cairn of the Old Man of Coniston is in sight on the furthest peak, but it was difficult to judge scale and distances in such a bleak landscape, and I didn't realise that it was still 2 km away.
Though the nearer 'lump' is substantial too (796 m asl; the Old Man is 803 m), and has a cairn of its own, it seems to be unnamed.