OH ****! ARRRGHHHH

Okay so it was kind of a nice day here with the storm yesterday there's been very very cool breeze blowing in from the West I figured I'd turn around and take the car out around the block a few times. Well long story short drove the thing about an hour from Plant City here to Land o' Lakes with no issues today it seemed like it was hanging up in first and second (lokar) well following some cool stuff I found in here I put one of them her slapstick reverse lockout shifters in it underneath the console after my factory shifter just jumped in reverse on me, while the car was running, at an idle in the yard, TWICE, anyway, so I was attempting to up shift, Here's the Clincher( and this is where I need some help and advice)the damn thing went in Reverse and locked up 295-50s! I wasn't going horribly fast at all maybe 25 maybe 30. But I'm also wondering what kind of damage I could have done and what I need to look for and or what needs to be replaced (before I really screw something else up) next time I take it out and hammer on her. For some odd reason it seems like I'm hearn' like a dinging here and there, underneath there that I don't remember before.. but it's a good thing I had to different belts on my water pump cuz I swung one of them! She got a little warm but not too bad, I think that's just cuz water came out of something I don't even know how that happened. Much appreciation for all watching insights on this matter, hope everyone's doing well! Many Thanks!
My dad did that on the hwy when a lady pulled out in front him in his 77 van, put in revere on accident (floor shifter) locked the wheels up and flipped on its side. When he got it towed home it fired right up and the trans lasted for a couple years after in another van.