Not stupidity, just ignorance. Much different!
The first is incurable, the latter is... it just takes time and can be painfull, like in this case. But by sharing, you taught me that gobies can and will jump! When I first started asking questions most of the respnses were that
SW just don't jump as much as
FW and not to worry about it. (And that was from posts on this site!) With your story, and the additions of others, I know the prior information is not as reliable as I thought.
Using this information, I have replaced the lid on my 6
gal and just drilled small holes for ventilation of heat (which is why I removed it thinking I did not have to worry about jumpers). I haven't even purchased a shrimp or gobie, but was planning to go out last weekend and purchase. With your story, I waited, solved the heat/lid issue and can now go puchase with more confidence that my $ won't end up on the floor!
So you have helped me with my ignorance! Thank you. This is the reason we share, to help others with our prior mistakes. Your post is in the truest sense, the spirit of the site.
P.S. Bet you won't make that mistake again!