Well I've never done it but when my friend drove me home it was fine. He smoked but stopped after a while me and another kid smoked. He said that weed made it feel like we were going faster so he was more cautious of his speed. Just eat the firecrackers when you get there and hopefully you will be there for more than an hour so u can chill. As for eating the firecrackers if you eat them on a full stomach it could take like 30-60 minutes for it to kick in.