say hello to mark rober, everybody!applause ] ♪ >> jimmy: so last time you were here, you came up with these great ideas for people that they could do -- most of these things you can do at home. >> that's right. >> jimmy: you have more stuff specifically themed to summer? >> yeah, that's right. so like the fourth of july is right around the corner. so the concept here is that these are just four ideas you could do just without much effort at all. >> jimmy: okay, perfect. >> we have kind of like last time, starting from easy all the way up to expert. we'll start on the easy stuff. >> jimmy: what about these? >> the worst thing that can happen at your barbecue, you're going to cook everyone's hot dogs and your barbecue runs out of propane or charcoal. >> jimmy: or a hand blows off. >> maybe that is the worst. don't worry, turns out that doritos are actually super flammable. >> jimmy: you didn't spray these with something to make them flammable? they are naturally genuinely flammable? >> super flammable, yeah. you've got a