I had a big problem with field mice one year. It was horrible.
I tried the humane traps, and would drive them to a field to release, freaked out the whole time. yikes.
I worked with someone who used to put baited mouse traps in a paper bag, then just dispose it it. Once, it just caught the foot of the poor thing. She was so upset that she went out to her garage - started her car up and stuck the bag over the exhaust to 'put it down'.
We had a FAT mouse a few weeks ago. The trap snapped on it but didn't kill it, so it banged around the downstairs bathroom for an hour or more. Mark and I were asleep, so my oldest daughter just shut the bathroom door, turned up the TV, and waited for her older brother to get home from work and take care of it. Not cool. It would have been kinder to just kill it outright, to my mind, but she couldn't do it