this bomb works with a mixture of butane, so you can have a rather strong odor, and especially do not do it near a flame !!!!
and reminds entered bombs on end like this, inverted bomb causes a gas outlet temperature is low, so be careful to avoids frostbite because yes, it's really cold, and you could damage n 'any components made so careful to position the bomb before a pulse.
ps: you can do it on your girlfriend, but she may not too keen on the change in temperature.
if that comment helped you to thank you noted, if not made a remark.