Originally Posted by
MSPeconomist
Did the passenger actively pop the blister or was this something that just happened, so that the fault is in not covering the blister and/or wearing shoes and socks on board? The word "pop" could either mean that the passenger did it (like the Dr Pimple Popper connotations) or that it just popped accidentally of its own accord without any action by anyone.
One of the articles mentioned she was barefoot, so the blister wasn't covered.