I had to have a brain scan thing which involved putting electrodes on my head and attaching them to a data-recording device. It could be done at home, but it was very unpleasant. One of my dogs sat on my lap almost the entire time.
The other one chewed up the memory card when the technician took it out of the machine and had her back turned for about 10 seconds.
Thankfully, they had enough test data to get what they needed.
The dog that sat on my lap is no longer with us. The evil one that chewed up the memory card is still with us and doing other evil things all the time.