Sometimes it is presented as having a timing device automatically release the spikes, while other performers have their assistants appear to cut through a securing cable or merely let go of the cable at the appropriate moment. In many performances, the rope which supports the spikes in their raised position is set alight, releasing the spikes when it has apparently burned through to the point where it no longer has the strength to support the weight of the spikes.
Sometimes it is shown as a timing mechanism automatically releasing the spikes, while other performers have their assistants appear to sever a securing cable or merely release it at the right time. In many performances, the rope that holds the spikes in place is set on fire, causing them to fall when it appears to burn through and no longer supports the weight.