Here's my 2 cents on this topic :
- Triumph, definitively one of my best reaction getters !
- 4, 5, 6 packet trick in Sal Piacente's expert card magic lecture notes. Looks absolutely impossible ! (quite similar to Devastation on Geoff William's "Miracles for Mortals", but stronger in my opinion).
- The eye of Stonehenge by Lennart Green
- Stigmata by W:H of course, so simple to perform and yet SO hard hitting
- KAOS, by Sean Beard...WOW a signed CTW which is also impomptu !!! Could you ask for more ?
I didn't mention it here, as it requires a pen to sign a card, flash paper and a lighter (not so impromptu, so a bit off topic, but appart from that "The Phoenix Effect" from Jay Sankey is unbelievable !)