decrepit said..
If they aren't too big, you can drop an icecream container over them, slide a thin sheet of something under them and carry them outside, just be sure there's no gaps between container and sheet.
I can tell you my extraction method once. Another long time ago, when my 1st house settled 20 years ago, I jumped in the car at work to pick up my keys at the real estate agent. Driving off the site's road, a big Huntsman appeared on my radio. I haven't been living in Adelaide for very long, and didn't know what they were. I just saw Alien movie in my car. So I jumped out of the car as it was going along. The car was doing about 10km/h I think, and I was jogging along next to it. A runner stopped me and said to me something like "What the F are you doing mate ?". And I told him. He just Hummffed, and said let's look. The car rolled to a stop and conked out. So, he was there with a piece of cardboard trying to extract it from the front passenger foot well. He was dicking around for a minute or so, until I pushed him aside, and rammed my foot repeatedly into the foot well. He called me a f/head, and jogged off. But, crisis was averted. The end.