Yes the sudden release of meeethane gas could result in a pungent odor!!
We get a few stinker deer lying along the road that look like they could blow at any time.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.