Does heaven exist? With well over 100,000 plus recorded and described spiritual experiences collected over 15 years, to base the answer on, science can now categorically say yes. Furthermore, you can see the evidence for free on the website allaboutheaven.org.

Available on Amazon
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This book, which covers Visions and hallucinations, explains what causes them and summarises how many hallucinations have been caused by each event or activity. It also provides specific help with questions people have asked us, such as ‘Is my medication giving me hallucinations?’.

Available on Amazon
also on all local Amazon sites, just change .com for the local version (.co.uk, .jp, .nl, .de, .fr etc.)

Common steps and sub-activities

Watching helicopter blades

Helicopter blades can also provoke a spiritual experience via the light flickering through the helicopter blades as they rotate.

Clearly this  is a serious concern, as they could [and have] cause hallucinations and as a consequence accidents.

Occasional Paper No. 1; The Early History of “Non-Lethal” Weapons - Neil Davison
December 2006,  Bradford Non-Lethal Weapons Research Project (BNLWRP)
Department of Peace Studies, University of Bradford, UK

In the 1950’s investigations of US military helicopter crashes found that the pilots had become disorientated by the stroboscopic effect produced by the sun shining through rotating rotor blades.