a search in this forum only led to two results about this topic. Both contained questions if somebody has done selfbondage with a vacuum sack. If I missed a post and this scenario existed, please excuse the double post.
This is what I did yesterday afternoon, as already said in the topic it involves a vacuum rubber sack and a USB controlled power board.
Materials needed:
- Vacuum sack, here's an video which one I bought:
http://www.youtube.com/watch?v=RXnSf48TDZw
I don't want to advertise, but in the description is an email address of the german guy who sells these things for around 130€. Worth it in my mind, but check yourself. Maybe there's also something in the DIY section of this forum. I didn't check thoroughly. - USB controlled power board:
http://www.amazon.de/reVolt-Automatisch ... osenleiste
This power board is plugged into a normal outlet and via usb in your computer. The usb only works as a on/off switch. If you shutdown your computer, the power board shuts down all the devices plugged in. Usually used to switch off displays, printers, sound system etc. - Time controlled power outlet (something like this: http://www.amazon.de/reVolt-revolt-Digi ... osen+timer). You need to be able to set an interval in the future where power is enabled. Not only a countdown-timer.
- Thin tube (1 to 1,50m long)
- Blowjob Trainer (search in this forum)
- Shutdown Batch-File (see details further down)
- Plug outlet timer into outlet (power on in 15 minutes, power off in XX minutes - this is your safety fallback)
- Plug USB outlet into outlet timer
- Plug USB from outlet into computer
- Plug Vacuum cleaner into USB outlet
- Tape Vacuum cleaner onto tube that sucks air out of vacuum sack.
- Create a batch that shutdowns your computer. Typing "c:\windows\system32\shutdown -s -f -t 00" in a textfile saved as shutdown.bat works perfectly for me. If you have no idea what to do, google it. Test it.
- Configure Blowjob Trainer, also set newly created batch file to be executed after completing task. Test the blowjob trainer thoroughly and many times. Work with small max limits. Just make 100% sure you can still finish the task.
This is the basic setup: Get yourself into the vacuum sack. Add the additional small tube so its running through the opening for the head so that always a little bit of outside air is flowing into the vacuum sack (small blue tube in the picture)
When the power goes on, the vacuum cleaner sucks the air out and you are completely helpless. Be careful, that vacuum sack is strong!! Start sucking, when finished the computer shuts down and the power board switches off the vacuum cleaner. Air runs through the small tube into the sack and you'll be able to free yourself after a couple minutes. If laptop doesn't shut down, the timer shuts down the vacuum cleaner. In case of power off, everything is switched off anyways.
Notes:
Be careful, it took me a long time to make this relatively foolproof.
Problems I encountered:
At my first tries with the vacuum sack I had my hands near the opening for the head to let in air. Don't underestimate the power of vacuum cleaner! And if your heands are at the wrong position you will NOT be able to move them one centimeter if the air is sucked out. That vacuum sack is unforgiving! Without the extra tube to let the air in it will stay tight for hours. Don't be as stupid as me, I had to roll from the bed to the floor until the tube which goes from the vacuum cleaner into the vacuum sack was pulled out and air could get in. Expect cramps and limps falling asleep. It takes time to find a good position. Experiment with very short periods of time inside the vacuum sack.
Last but not least:
I did this a couple times and still only go for very small limits:
Time interval for timer-controlled-power-outlet: 20 minutes (-> safety off after 20minutes)
Blowjobs: start with 10 and max of 30. (I still fail quite often, remember your restricted movements. This is usually more than enough). After these short sessions I'm exhausted like after a one-hour-workout in the gym. It feels absolutely fantastic though
Have fun,
if there's a link in my signature please click it.