A backside-borne IED?

In late August, a known al-Qaida in the Arabian Peninsula militant attempted to assassinate the Saudi head of counter-terrorism, Assistant Minster of Interior for Security Affairs, Prince Mohammed Bin Naif. The attacker, Abdullah Bin Hassan Bin Taleh Asiri (23), was supposed to be surrendering himself to the Saudi authorities. He was transported from the southern border region to Jeddah on a Saudi private jet. Upon meeting the Prince and during discussions regarding the surrender of other militants, Asiri detonated his device.

There are two curious aspects to this incident: first, how did Asiri manage to get a device on an aircraft and then into proximity to the target; second, why was he the only casualty? Both questions might be answered by reports that he had secreted the explosives internally (to be specific, in his anus). This is the first time I have heard of a suicide attacker seeking to conceal a device in such a way. Presumably the combination of the necessarily small quantities of explosive (and I’m guessing not much in the way of shrapnel), combined with the fact the attacker’s body must have absorbed a large amount of the device’s energy is what saved the PRince from more than minor injuries.

An interesting example of an innovative but not entirely successful variation of the suicide attack. I wonder if an airport security scanner would be able to pick up such a device?