Other permitted cases include:
• lightly shaking clothing so it does not cling to the body in Ruku;
• wiping dust or grass from the forehead after prayer;
• wiping it during prayer when it causes harm or serious distraction;
• looking from the corners of the eyes without turning the face;
• killing a snake or scorpion when harm is feared.
The source does not set a fixed maximum of 3 strikes for killing a dangerous creature. It expressly allows multiple blows where needed. A turn of the chest away from the Qiblah remains a separate invalidating issue.