I think it's safe to assume that after NASA successfully landed two rovers on Mars in January of 2004, the momentous event was quickly eclipsed by the following jealousy-tinged letter of congratulations, sent to the JPL days later by a certain Dr. Bunsen Honeydew and his accident-prone assistant, Beaker.
Note: Although the Spirit rover's initial problems were overcome, it's unknown whether Beaker's "Spring Fling" was ever called into action.
(Source: Scott Hanson at Muppet Wiki; Image of Beaker & Bunsen via.)
THE Jim Henson COMPANY
TO: MARS ROVER MISSION TEAM
FR: Dr. Bunsen Honeydew & Beaker, MUPPET LABS
It is with mixed emotions that Muppet Labs offers you a hearty "congratulations" on the recent success of your Mars Rovers, Spirit and Opportunity. While we realize that your remarkable accomplishment is a really nifty thing for the entire scientific community, we at Muppet Labs Mars Exploration Team (MULMET) wanted to get there first! We were so close: a mere three weeks--give or take a 20 year margin of error--from launching our own Mars explorers.
Nonetheless, in the spirit of scientific camaraderie and with a promise that we'll-beat-you-next-time, Muppet Labs sends you and your team an enthusiastic "Well done, bucko!"
(Signed, 'DR. BUNSEN HONEYDEW PHD ESQ.')
DR. BUNSEN HONEYDEW
PS: If you continue to have difficulties with the Spirit Rover, my assistant Beaker is happy to offer free roadside assistance on Mars, utilizing our new, thoroughly untested Interplanetary Coil-Powered Catapult...or as we at MULMET like to call it "The Spring Fling".
PPS: Meep-meep-meep-meep-MEEP-MEEP-MEEP-MEEP!!!!!! NOT!