Is positional asphyxia a worthwhile method?

[thecolourgold]

I've been watching lots of videos to get better techniques. I recently saw positional asphyxia, in which the weight of the chest and shoulders makes someone ctb. Is this a method? Is it possible to do this on purpose or is this more of a "happens by accident" thing?

 

[Someone123]

This doesn't seem like a feasible method to me, any case I have heard of is by accident or by others causing this.

 

[Walilamdzii]

This mainly happens to infants.

 

[illAF]

I've been watching lots of videos to get better techniques. I recently saw positional asphyxia, in which the weight of the chest and shoulders makes someone ctb. Is this a method? Is it possible to do this on purpose or is this more of a "happens by accident" thing?

Where do you guys find all these videos ?