On May 8, 2021, a Boeing 737 crew departing from Houston Hobby Airport encountered an unidentified object during initial climb.

© Sentinel News
The incident, documented in a
report by the nonprofit organization
Americans for Safe Aerospace, raises questions about flight safety.
As the aircraft climbed past 14,000 feet (4,260 m), air traffic control urgently ordered it to level off at 15,000 feet (4,572 m), reporting unknown traffic in their sector ahead, two nautical miles (approximately 4 km) away, rapidly approaching.
The controller noted that this radar echo had "already appeared intermittently throughout the day."A few seconds later, both pilots visually identified an object that was
described as an oblong spheroid lacking wings, windows, and navigation lights. They described its surface as metallic and resembling molten mercury.
It had a translucent appearance, shifting shape, and seemed to pulsate and vibrate.The co-pilot estimated that the object was about the size of a Boeing 737. However, the report mentions a length of approximately 40 feet (12 meters). This estimate is difficult to reconcile with that of a 737, which is about 40 meters long. This introduces an inconsistency in the description, likely due to a conservative estimate.
The object initially appeared to be stationary. When the co-pilot initiated an evasive maneuver to the right, the object instantly accelerated along the axis of the aircraft's left wing and left the area at a very high speed. The entire event lasted less than ten seconds.