whats the worst thing youve ever forgot to do while high?

It's not like losing a 1/2 lb of weed, but I've forgot a lighter or pipe sometimes when going out to an awesome smoking spot. Like this one time, me and two other freinds walked about 5 minutes to the bottom of this small mountain thing. We proceded to walk about halfway up, to this awesome little copse of aspen trees, where we had put some stups to act as chairs. We get up there, I pull out a joint I rolled before leaving, dig into my pocket for my bic, only to find it wasn't there. I had to run the 10 minutes back to my house to get it, then the 10 minutes to get back. I did have an awesome relaxing smoke though.

I forgot that rolling around in a field full of mosquitoes wasn't a good idea. Next day had 38 on my left arm.