Dry Ice in the trunk of my car

[TiredNorthStar]

An idea spinning around in my head is dry ice in the trunk of my car. I'll line the area with a tarp to be a little more airtight and ease cleanup. Maybe I'll tape over some vents with packing tape too just in case. Then I'll fill a bucket with dry ice and hot water, and curl up next to it, in the trunk/ behind the seats. I worked around big bins of dry ice a few years ago, stuck my head in them a couple times so I know the panic feeling. If its concentrated enough the haze takes over quick, and there's not much panic, I think I can push through. CO2 being denser than air, it should stick around long after the dry ice disappears. Thoughts on this method?

 

[Worndown]

It might work, but it is not likely.
Cars do vent air when running. They are not air tight

 

[notreallybored]

It might work, but it is not likely.
Cars do vent air when running. They are not air tight

ב''ה,
Cars specifically have vents usually located in the trunk area (between 'somewhat safer if someone gets stuffed in the trunk' and easier to cover with the bumper or fender) so your ears don't pop/HVAC blower works/doors shut.

In this scenario they might be letting the air out first rather than creating a pressurized mix of air and CO2. Possibly taping over them without worrying about modest leakiness of tape would hold it in longer while avoiding any overpressure that might implode your eardrums if that's even possible.

Not sure how this compares to a nitrogen tank or propane tank or if the latter would be any sort of idea aside from the explosion risk.