HOW (not) TO – Chem lab mistakes

Derek posed a great question about chem lab equipment gone wrong, check out the comments for some good ones and post yours –

Here’s a question for the readership that should generate some interesting answers: what’s the most valuable item you’ve seen someone ruin in a lab? I’ll leave it broad enough to include both equipment and materials, and I expect to cringe numerous times on reading the comments.

How Not To Do It: Ruining Stuff. In the Pipeline: – [via] Link.