Сухопутные существа. Великобритания

I'm not sure what I saw but it was terrifying..

Okay so I'm kinda new to posting here so forgive me 😅

I think this is the best place to find out what I saw.

Okay so me and my friend were walking around a massive park in my town and it was around 11pm we were just walking around having a smoke and a laugh being teenagers and stuff. And by this point it was pitch black, theres no lights in the park and I'm a bit on edge because I'm not keen on the dark and I was kind of paranoid from the weed but I'm gonna just cut to the interesting part..

So me and my friend, let's call them Sam, walk towards the actual swing park within the park and we're like 10 feet from the park and theres this unexplainable rancid smell that physically caused me to gag, we joke and say something about it being this girl from school we don't like and head into the park, the smell only getting stronger and I glance over at the small wall surrounding the park and theres a bench and squatting behind the bench but still at least 5 ft tall squatting was what looked like a freakishly tall guy, but he appeared to be naked and hairless. We both kinda stared for a minute before looking at each other as if to say " Yo, you can see that right" and the thing started laughing like a 4 year old girl, we noped the fuck out of there and ran like our lives depended on it (( they might have )) and went home and just laughed it off and kind of forgot about it, at least Sam forgot about it but it was weeks ago and I'm still spooked and refuse to go near that park after dark...

Can anyone help me figure out what I saw? Thanks