LOL I thought I was going to be that guy when I first started training at my gym. Pretty interesting though, we were running the 'gauntlet' on a fellow training partner to get him ready for his professional mma debut, he's probably around a purple - it was no breaks, go until someone is subbed from one person vs him to the next. Some random guy walked up, heavily muscled and scarred up I might add and asked if he could join in. Nobody wanted to interrupt the gauntlet but another lower-level grappler volunteered to roll (it was after class). Needless to say a random 240 lb. very lean, muscular guy is going to draw some attention when it comes to grappling (I am built similarly and was sizing him up, I was hoping to watch him gas in about a minute like I did the first few times around). It took around 30 seconds.. but man the guy was fluid, passed guard powerfully and with excellent technique and armbarred the kid from full mount, he didn't really go 100% and the lower-level grappler (maybe blue belt? i only attend no-gi) was really trying to save face and pry his arm out, but the bigger guy slowly applied pressure and got the tap. Next up he rolls with the purple and ends up in rear mount and eventually gets the rear-naked. Now this guy had weight on everybody but me (I didn't get a chance to roll with him... it would've been fun) and he was probably fresher... but it was goddamn impressive and nobody seemed to know who the guy was. He apparently was in a hurry and had to leave after subbing like 3 guys. It isn't like he came and subbed an instructor or anything, but it was still pretty awesome. Anything like that happen to any of you guys?