Verified answer

It just happens, it depends on a variety of factors, your own chemical make up, the strength of the acid and your mood.

My last acid trip - I sat in a club on a chair for 5hours believing that if I moved my arms and legs would fall off. - what makes this worse is that 2 hours in I started needing the loo.

Needless to say I NEVER touched the stuff again because with acid you don't realize that you are tripping that is what makes it so intense.

Although I do enjoy mushrooms every now and then (its like low grade acid - much less hectic and also you can come down quickly by eating something sweet)

Stop doing acid and get a life! When you have a 'bad trip' it will be very obvious! You won't need to ask anyone about it.

its mainly in your subconcious so you really cant control it but if you do acid anyway be in a nice place no where sketchy so you dont freak yourself out