Need safety tips for cutting corrugated steel roofing - almost lost a finger!

Hey everyone, total newbie here trying to DIY a small shed roof. I bought some corrugated steel panels and need to cut them to size. Tried using my circular saw with a metal cutting blade yesterday and it was sketchy AF - the panel was vibrating like crazy and I almost sliced my hand open when it kicked back. What's the safe way to do this? Should I be using different tools? Any tips to avoid turning my shed project into an ER visit?

First rule: STOP using that circular saw immediately. You're lucky you only almost got hurt. For corrugated steel, you need to clamp it down securely - use C-clamps on a stable work surface with scrap wood underneath. Best tool is tin snips for straight cuts or a nibbler if you have one. Angle grinder with cutoff wheel works but wear full face shield, leather gloves, and hearing protection. The vibration you felt is because the thin metal flexes - that's what causes kickback. Secure it properly or you'll be posting from the hospital.

Tim's right about clamping - that's non-negotiable. I'll add: if you're using an angle grinder (which I do daily), make sure you're cutting AWAY from your body, not toward it. The sparks will fly everywhere so clear any flammable materials. Also, corrugated steel has those ridges - cut along the flat parts when possible, not across the peaks. And for god's sake, don't try to hold it with your knees like I see some DIYers do. One slip and you're cutting through muscle.

One more thing since I see this all the time in my shop: people try to rush through metal cuts. Let the tool do the work - don't force it. If you're using snips, make smaller cuts instead of trying to bite off too much. If the metal starts getting hot (which it will with power tools), let it cool. Burnt fingers are the least of your worries - hot metal can warp and suddenly snap. And always, ALWAYS wear eye protection. Steel shavings in the eye will ruin your week.

Wow, thanks guys - definitely ditching the circular saw approach. I have tin snips and an angle grinder so I'll try the clamped-down method with the grinder. Full gear on, promise. Tim - the scrap wood tip makes sense, I was just putting it on sawhorses. Greg - didn't even think about cutting direction or the ridges. This is why I asked before trying again. Really appreciate it - might actually keep all my digits intact!