I hate when you drop something and see it land right in front of you but somehow it mysteriously disappears!
WHAT THE HELL??!! You fell right in front of me on a bare, flat floor, what f**king black hole from hell did you fall into???
Then you're left to hopelessly crawl around for about a half hour only to give up and accept that it's gone forever...
... or find it somewhere stupid like in your boot an hour later.