Every day I try and draw a "Today in History" comic on my classroom whiteboard. Generally, I only have 20ish minutes to do it while I'm multitasking and doing a million other things to get the kids situated and start the day. 9 times out of 10, it's a rush job, and I later cringe at mistakes I don't see while I'm doing it in the moment. Poor draftsmanship being the most obvious. Not to mention, the occasional misspelling, poor grammar, incorrect data, a bad caricature and a million other things. I use photo reference when I can and wing it when I can't. Here are a few to start the thread, I'll add more when I have time.