Trivia: This was John Candy's last film he made. He unfortunately passed away in his sleep before filming wrapped up. Re-writes and stand-ins were used to finish the film. Candy had finished filming "Canadian Bacon", but "Wagons East" was released 13 months before "Canadian Bacon."
Answer: It appears to be a woman standing up and reaching for something in her wagon. As the camera pans away, this stool can be seen thrown and landing - breaking apart.