The final cluster includes an oven or brazier with burning embers directly in front in the stated case; sleeping people directly in front; wiping harmless dust from the forehead during prayer without need; permanently fixing one Surah and refusing to read any other unless it is simply easier because of limited memorization or one follows a transmitted recitation practice; and failing to take a Sutrah where one reasonably expects people to pass in front.
L033 studies the Sutrah itself in detail.