I recall reading of a case in an old USAF jet trainer (tandem, maybe a Thunderchief? T-33?) where the back seater was trying to get more comfortable by wriggling on the ejection seat. He set off his 1-man life raft under his seat cushion.
It expanded rapidly, and started pushing on the control column, felt by the pilot in the front seat, who then had a hard time holding it against an increasing pressure. He also heard the muffled groans and grunts from the backseater as he was squashed up against the canopy. The backseater grabs his survival knife and stabs the dinghy, resulting in a loud BANG, a cloud of talcum powder, and the control column suddenly going slack.
Stuff this, thinks the front seater, and he ejects.
Oops, thinks the back seater, and also ejected. Don't know how successful it was with a tattered dinghy interfering with the ejection seat, but it makes a good story.
