Doing the Insanity workout outside?

The last time I did an insanity workout, i kept running into stuff, and was unable to do some exercises due to space. I was thinking about taking my laptop outside and doing it, and I thought that doing it outside in the heat would help burn more calories and get me even fitter. Is it wise/safe to do this? I think it'd get me in tremendous shape, but it'd be hard as hell at first and would take a lot of dedication on my part. Thoughts?