My least proud parenting moment was whilst ds1 was having a tantrum - it's a story I have shared several times on here.
He'd had an hour-and-a-half long tantrum the night before, and it was not yet 9am, and he'd been screaming for 45 minutes. I was pregnant with ds2, and couldn't take any more, so I was on the phone to dh, in tears - sobbing that I couldn't cope - when suddenly he went quiet.
I snivelled my way off the phone, and went to find out what had stopped the tantrum, and found him at the kitchen bin. Dh and I had had tortilla chips the night before, but hadn't eaten them all, so had binned the leftovers - the bin was pretty full, so they were within ds1's reach, and he was eating them!!
The worst part was this - I debated taking him away from the bin, but didn't, because I knew he would start tantrumming again!!
So I let him carry on eating them, until he got bored/had enough, and wandered off - then I emptied the bin, and found it a new home, in the cupboard under the stairs, where he couldn't get to it if he fancied any more snacks!