One of those really big American strategic bombers buzzing around in the fifties or so (don't recall the name, but it apparently has the distinction of being about the largest class of bomber the US ever deployed) also tried that fighter-carrying schtick. I think the fighter was called "Goblin" or something like that.

Somewhat related, but not all that weird as such, would be those twin-hull Mustangs. A bunch were given specially trained crews should the Cold War go hot and it become necessary to send strategic bombers deep into the USSR; these things were supposed to fly escort, and nobody had much illusions theirs would almost certainly be even more of an one-way trip than the bombers'...