Step 1.
Take an A4 sheet of paper and fold the paper diagonally so that the top edge meets the right edge.
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Step 2.
Take the newly formed top right corner and fold it so that the old top edge meets the bottom formed by the old partial side edge.
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Step 3.
Fold the newly formed structure in half along the vertical division.
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Step 4.
Fold the full structure back on itself (halving it again) along the vertical division.
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Step 5.
Using scisors, cut the structure in half vertically.
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Step 6.
Several pieces will come from the paper. Take the largest piece of them all and put it aside.
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Step 7.
All eight smaller pieces can be unfolded to spell out "HELL", as shown below. The ninth larger piece can be unfolded to produe a cross.
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And of course then there's the patter - which goes something like "Two people went to the gates of heaven having died, Good and Evil. Evil decides to try and get some help by taking half of Good's ticket. However, when Evil unfolds his ticket, he gets the word Hell. When Good unfolds his remaining ticket, he gets a cross and is allowed to enter" - or something like that. It never fails to impress people when you show it to them!
Hope you all like it - and I hope our resident God doesn't get too upset at having discovered his little secret!