I think it's issue #27 where that happens, but I could be wrong. His double gets impaled when someone uses it as a shield against one of Madison Jeffries constructs, or am I mis-remembering?
#28, Courtney (the robot) used him as a meat shield against Jeffries when he turned a car into a weapon....
http://en.wikipedia.org/wiki/Flashback_%28comics%29http://www.marvunapp.com/Appendix6/flashbackaf.htmDuring Alpha Flight's second encounter with Omega Flight, one of Flashback's duplicates was killed by a construct created by Madison Jeffries after Courtney used it as a shield against an attack, causing all other duplicates present to vanish. Upon the realization that his duplicate's death would mean his death in the future, Flashback fell to his knees in shock while Jeffries dealt with the remaining Omegans and destroyed Courtney. Flashback and his teammates were left under guard by Jeffries' construct until the police arrived to apprehend them.
Some years later Alpha Flight was informed that Flashback had disappeared from prison. Alpha Flight took this to mean that Flashback's past had finally caught up with him.[volume & issue needed] This was not to be, as years later Flashback resurfaced. Having sworn off his powers, he tried to destroy his costume, reasoning that if he didn't have his costume he couldn't be sent back to his death.[volume & issue needed]
Then one morning Flashback woke up to discover his costume hanging in the bathroom. This version however had the same design as the ones worn by his duplicates. Flashback soon discovered that no matter what he did, he kept on finding himself in the duplicate suit.[volume & issue needed]
In desperation, Flashback contacted Sasquatch and his Alpha Flight team and convinced them to help him. The Alpha Flight member Nemesis came to the conclusion that she would have to kill him with her enchanted blade in order to stop him from dying in the future. After much trial and error Alpha Flight managed to keep Flashback from being sent to the past.[volume & issue needed]