Lucky: On Mario Kart 7, online, there was lag and everyone else froze while I got away and got an early lead, but...
Unlucky: Due to my suckiness and bad item luck, I came around 5th or something. :/
Hilarious: On battle online, we were in Honeycomb House, and this Toad was just on the edge of this cliff outside, and he was just relaxing, oblivious to anyone else, alone. So obviously I rammed into him with great force smashing him off the cliff, and I drove off.
Also Lucky: I somehow got an early lead on SNES Rainbow Road, and I was way ahead, but I fell near that big gap with the two Thwomps, and I fell a few places, but I got a Golden Mushroom and skimmed that big gap, rammed into people and took my crown as first place.
Another Lucky: On Wuhu Island Loop I was in a heated battle for first place and I managed to pull off that jump with the three small platforms and the guy who was in first place slipped on my banana, but somehow he got in front again, but a Blue Shell came to my rescue.
I have a lot more luckies and unluckies but that'd take forever.