reset() doesn't work after called doge()

[kiner-shah]

When I called doge(), it printed some random text on the page, next I called reset(), the text should have gone away (removed from the page), but it is still there.

Note: doge('clear') works, but reset() doesn't work for doge.

Same thing I tried by calling dancer() followed by reset(), the dancer was removed from the page.

Also, why does help('reset') shows message "No no. reset is no here."?