J52 turbojet spontaneously bringing itself back to life after ingesting a full-grown seagull a few moments after we went airborne. Tower wasn't kind enough to mention the flock of gulls around midfield when they cleared us to T/O. We spooked several dozen into the air, and were lucky to hit only one of them.
That one went down our left intake (this was in a two engine EA-6B). We heard an incredible "bang", followed by the RPM, EGT, and FF tapes for that engine dropping to near flight idle. You could feel the thrust fading. Then, after what seemed like a long, long time (honest to goodness time compression), the engine wound itself back up to MRT (military rated thrust, fancy term for "full power"). Once we ascertained that we were still flying OK, we declared an emergency, started dumping gas, and turned back into the pattern for a quick PEL, which we executed perfectly.
Oh, did I mention that this happened on my second operational flight in the fleet? Never heard such a sweet sound as that engine coming back to life. . .