decent
but really good for something on the internet. however keep in mind that while your jokes are cliche they aren't that creative as well. and thats what makes the difference. for example when hes throwing the bomb down the ramp and it blows up immediately. what would've perhaps been funnier is if it had worked, started rolling down and as he waits to hear the boom he doesn't realize that the he built the ramp poorly and the bomb has ended up landing near him towards the end of its fuse. as he hears the fuse he looks to his side and then boom. now thats (at least i think) funny.