Motorboat running, increasing in speed then steady. Water sloshing and some birds. Eventually slows and heavy wave sound. Engine revving and sputtering at end.
Giant electrical discharges. From flash gordon's spaceship. Loud echoey booms with a vibrating hum, similar to an jet, following. Reverberant. Hum would also be great for a sci-fi score.
Roller coaster clanking up track in distance. Metal clank as it is pulled up. Shuddering and roar of car as it runs. Some voices talking from the ground. Some wheel squeak and a "woo!" towards the end.
Low frequency predominant. Rumbling and whistling intense but slightly distant winds. Probably better as an interior p. O. V. Could be used as wind inside a cave, or observing outside winds from a sheltered space.
Loud, fast steps on two different surfaces. Very loud clacks and then slightly deeper clicks. High heels. Could be someone walking up or down stairs with many landings.
Close up crowd, with car noise in background. Male and female voices talking jovially. General rumble of conversation with some voices standing out on occasion. Laughing and conversing loudly.