I don't recall imagining a particular character, just a humanoid figure running alongside and jumping over/dodging stuff.

Apparently this is one of those things that nobody ever talks about, but a lot of people did.

Mine was a cool skateboard dude who did the most amazing grinds and flips

Close, but not quite the same. I used my fingers as the imaginary runner, leaping from thing to thing, riding wires, etc.

I hadn't remembered this in years, but I always imagined myself out there like the Flash and how my older brothers were in the car watching me burn it up and being super impressed. I literally might not have remembered that during my entire adult life. Thanks for reminding me. Although I was more like seven at the time.

Nah, I just imagine the vehicles two lanes over is armed with lasers and if there's a car in between us, it deflects the laser, otherwise, I lose 1 HP.

(The clouds that look like a face are deities watching you. Trees are sentient and waving at you)

Similar thing with walking. All moving cars have lasers and parked cars shield you from the lasers.

Also, the gap in between two squares of cement on the sidewalks have lava, make sure to not step over the gap.

Sonic the Hedgehog.

I got that Sonic Autism

No, all of ya'll are crazy. The dot of dirt on the window was the aiming device for a laser, and you had to use it to cut all the electrical wires without cutting trees or the poles, because those are wood and it would start a fire.

Nah, it was my imaginary friend doing bmx tricks, we didn't have parkour back then.

Also, how could a person run fast enough to keep up with a motor vehicle? Sheesh, does your imagination completely ignore science? You gotta have at least a bicycle to keep up.

Also, this is the first time I've ever seen or heard someone else talk about this kind of daydream. So, it's pretty fucking cool, even though the details aren't the same.

It's more fun in a high speed train

I loved sonic riders, so instead of the Lil dude doing parkour, he had a hoverboard to do sick tricks Sometimes the Lil dude was tony hawks

Damn, I thought I was the only one...

Parkour wasn't a thing when I was 10, for me it was Strider running along with the car and slashing stuff.

Tony Hawk’s

I'm an adult and I still do this lol.

Mine was an imaginary me on a dirt bike doing sick jumps

I usually imagined either sonic the hedgehog or one of the velociraptors from jurassic park

You guys got a window seat?

It was Mario, represented by a dirty spot or water droplet on the window, who would be made to jump over things by moving my head up and down

I had a cheetah running along, occasionally a horse. But not in the city, only on the motorway

I had a dragon flying along side. Sometimes it's a bike dodging opposing traffic and jumping ramps

I took my Dramamine so I could read without vomiting.

Grew up in a cold part of the world, was a skier doing grinds and flips, but yeah, same idea!

Mine was an invisible flying squirrel jumping and gliding between tree tops at 110 km/h...

It was the line painted on the side of the road that was zooming this way and that to keep up with the car. Sometimes it would snake away to a rest stop and then merge with us again after the exit.

Regrettably no. I would imagine myself unhinge my jaw and eat all the trees and brushes we would pass. For whatever reason, kindergarten-me strongly believed that everything without a heartbeat looked very delicious and edible. Trees, clouds, snow, sand, windmills, brick buildings, flags, other cars, busses and the sun itself.

Grew out of that phase when I began school, but yeah. In a way I kinda miss being so young and new to living that you're still figuring out what is and isn't possible. The world seemed a lot more fun when you didn't yet know the rules, lol.

I wonder what it will do to kids these days that they don't use their imaginations like this. Kids today will be glued to electronic devices.

I usually either imagined a dirt bike or it was Spider-Man or the Hulk