One thing I hate about my phone is that certain apps have horizontal swipe to delete list items. It presents an undo option, but the undo option doesn't appear for very long, and can itself be dismissed quite easy by accident. Text message conversations are especially prone.

The number of times I've deleted something with no recourse because my dog bumped my hand while holding the phone (or some similar unintentional action) went from frustrating to embarassing to enraging long ago.