Well, there is one similar joke where Tigger quickly lays down train tracks in front of a running toy train before it runs off of the tracks. That might have been an inspiration, who knows, but it's executed very differently either way:

https://www.youtube.com/watch?v=e5l_fGY-EfA&list=PL65tAzyNzM...

... and then the episode becomes a parody of Westerns as it switches to the "imagination vision" of the characters, and the story and gags are not really comparable to The Wrong Trousers at all after that.

I mean, I watched taped episodes of The New Adventures of Winnie the Pooh religiously as a small child and has strong nostalgia goggles for it, and even I don't think that it is on the same level. Even childhood me would have agreed: I remember loving and enjoying this episode (just like all the others), but the first time I watched The Wrong Trousers as a child I was genuinely laughing so much I had sore core muscles the day after, because I had never seen a film that funny and amazing before in my life.