Found my bike on its side in the parking garage - what should I actually check for?

A few hours on its side is where the real risk is, and you can check most of it yourself in twenty minutes. First thing: pull the oil fill cap or check the sight glass. If it sat sideways long enough, oil can migrate into places it shouldn't be, most commonly the airbox or the crankcase breather. Don't just look, actually start it and let it idle a few minutes. A bike that swallowed oil will smoke out the exhaust when it burns off. A little puff that clears up is fine, thick continuous smoke means pull the air filter and check if it's soaked. Also glance under the bike for any fresh drips on the floor after it sits overnight. As for battery acid, most modern bikes run a sealed battery that doesn't vent acid even tipped, so that's usally a non-issue. If yours is an older unsealed type and you smell sulfur or see crusty residue near the cap, that's a diferent story, but the starting and idling fine part tells me you're probably okay. Beyond fluids, check the brake levers and pedals actually engage and release smoothly, since a bent lever can bind. Stand in front of the bike, hold the front brake, and rock it to feel for anything loose at the bars or triple tree. Grab each footpeg and shifter and give them a firm tug. Eyeball the frame sliders or any contact points for cracks. On most bikes a parking lot tip-over bends levers, scrapes plastic, and that's it, the heavy stuff underneath is built to take it. If steering feels normal and brakes work, I'd skip the shop unless something feels off, and save the cash for the lever and mirror. On reporting: file a police report anyway even without a suspect. It costs nothing, creates a paper trail, and if this person does it to you or a neighbor again, a pattern helps. Liability-only won't pay for your parts, true, but the report is free. For the bent clutch lever, used OEM ones run cheap online and it's usually a two-bolt swap, so you might be back to normal for less than you think.

One thing to check that the reply didn't cover is the fork seal on whatever side it landed. I've seen forks seep a ring of oil after a tip-over, nothing at first, then a wet line down the lower leg a day or two later. Wipe the tubes clean and check them again after a couple rides. And before you buy that new lever, try bending the old one straight first. We did that all the time back in the day, clamp a box-end wrench over the bend and ease it back. Ugly but functional til you find a cheap replacement. Also, next time you have to lift it, back up to the bike, squat, and push with your legs, not your back. Learned that the hard way in a parking ramp about forty years ago.

Had a similar deal years ago, some clown knocked mine over outside a bar. One thing I'd add is check the side stand itself. Mine got tweaked just enough that the bike leaned way more than normal after that, and it almost went down a second time on me before I noticed. Also grab the bars and see if they're pointing straight ahead when the front wheel's pointed straight, tip-overs knock 'em crooked more than you'd think.

And next time you gotta pick it up solo, back up to it, squat, and walk it up with your legs, don't lift with your arms. Your back will thank you.

Update: checked the sight glass like the first reply said and the level looks normal, no oil smell anywhere near the airbox that I can tell. Wiped the fork tubes down too and one side allready has a faint wet streak after one ride to work, so that seal theory checks out. Also noticed my sidestep leans the bike a bit more than I remember, so I'll look at that tonight.