actually, this just happened to me a couple days ago (my first LD yay!)

Me and someone else (not sure who) were out for a run near my house, and we got halfway and were getting tired. Then they're just like "hey! let's jump!" so we started jumping home, jumping like 15 feet in the air, and whenever we jumped it would go slow-motion. anyway. we got back to my place, and went inside, and i'm like Hey, mom! check out what i can do, and i started jumping around in slow-motion (everyone else was fast, while I slowwed down mid-air). and she's like "That's a really cool new ability". and i'm like, "yeah! wait.. i can't jump this high!" then i realized i was dreaming (really low-level lucidity). and i'm like ALRIGHT! trying not to get too excited. i tried summoning some people, but it wouldn't work, so i went back to jumping over buildings, and stuff, which was super-fun, and then I lost lucidity.