Compressed air

So i went to best buy to buy some compressed air.
man what a story with just this stuff.
while i'm looking at the packs they come in i realizes it says they come with a free monitor wipe.
i couldn't find where the hell they put them on it.
so i check one of the ones alll the way in the back and it turns out it's this little packet that easily slides out.
i guess everyone's been stealing it from all of the other ones.

i walk up to the register and buy it.
the guy scans it and looks at me funny, but i don't think anything of it.
then all of a sudden he's like "someone's going to get high."
i just kind of laughed and said nah not really.
he then goes on to say how he finds it funny that their registers have this thing pop up and tell them to make sure the person buying it is 18...just in case they want to get high.
then he says how there are cheaper ways and stuff.
i wanted to get out of there so i just quickly said yeah, i know.
i leave.

i get home, open it up and i'm just reading the back.
the first thing i see is shake or tilt can before usage.
so i do exactly that.
then i realize that i had the can turned at just the wrong angle.
i see that it now says
NEVER shake or tilt can before or during usage.
oops.
now i'm just sitting here, waiting for it to settle down i guess?
bit scared of what might happen.